CN105954656A - Electric field measurement based internal defect detector for insulators - Google Patents
Electric field measurement based internal defect detector for insulators Download PDFInfo
- Publication number
- CN105954656A CN105954656A CN201610353619.XA CN201610353619A CN105954656A CN 105954656 A CN105954656 A CN 105954656A CN 201610353619 A CN201610353619 A CN 201610353619A CN 105954656 A CN105954656 A CN 105954656A
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- Prior art keywords
- electric field
- insulator
- data
- detection instrument
- defect detector
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
Abstract
The invention discloses an electric field measurement based internal defect detector for insulators. The detector comprises a portable device of a live insulator detector and a data receiving terminal machine, and the portable device of the live insulator detector is connected with the data receiving terminal machine in a wireless ad hoc network communication manner; and the portable device of the live insulator detector comprises a single-chip microcomputer, an electric field sensor, a photoelectric sensor and a data collection unit. According to the internal defect detector for the insulators, vertical electric field distribution of an insulator chain is extracted, an internal defect of the insulators is determined according to the vertical electric field distribution, data is transmitted to a computer of a ground worker via wireless network, and is displayed in manners as a curve, internal defects of the composite insulators in a high tension transmission line can be detected in a live-line manner, zero insulators can be identified, whether certain insulator has an internal defect fault can be displayed visually, convenience is provided for searching fault insulators from the transmission line, and the power supply reliability is improved.
Description
Technical field:
The invention belongs to power system insulation defect detecting technique field, survey based on electric field particularly to one
The interior insulator defect detector of amount.
Background technology:
Insulator carries support transmission line of electricity, isolation transmission line of electricity and other conductive bodies, safeguards power train
The substantial responsibility of system safe operation, the excellence of its performance is the most closely bound up with power system safety work.
Sheath and plug unsticking, sheath internal porosity or tomography etc. are caused due to reasons such as manufacturing process when insulator
During problem, these inner-defects can constitute great threat to the safe operation of electrical network.These disordered insulators
Electric Field Distribution uneven, produce electric field distortion at defective locations, the long term of high field intensity can promote insulator
There is shelf depreciation in the positions such as sheath, plug and gold utensil, makes Insulators Used deteriorate, and can cause absolutely time serious
Edge ruptures, punctures, and affects transmission line of electricity safety.Therefore, research is needed badly the most faster, examine more accurately
The method measuring composite insulator internal flaw.
The method more ripe currently for the detection method of interior insulator defect is ultrasound examination, should
Method is to utilize material itself or internal flaw scarce to judge inside configuration and surface on the impact of ultrasonic propagation
Size, shape and the distribution situation fallen into.Ultrasonic detection method detection adaptability is relatively strong, and inspection sensitivity is relatively
Height, harmless, use flexibly, the more convenient operation of equipment, equipment relatively inexpensive, but can not carry out
Live detection, testing conditions requires height.
Summary of the invention:
It is an object of the invention to provide a kind of interior insulator defect detector based on electric field measurement, charged
In detection ultra-high-tension power transmission line, the interior defect situation of composite insulator, identifies zero resistance insulator.
For solving above-mentioned technical problem, the present invention takes techniques below scheme:
A kind of interior insulator defect detector based on electric field measurement, portable including insulator charged detection instrument
Device and data sink, described insulator charged detection instrument portable unit and described data receiving terminal
Machine is connected by wireless self-networking communication mode；Described insulator charged detection instrument portable unit include single-chip microcomputer,
Electric-field sensor, photoelectric sensor and data acquisition unit, wherein:
Described single-chip microcomputer is for carrying out the longitudinal electric field data valid in each cycle received at smothing filtering
Reason, and by the way of wireless self-networking communicates will process after data send to data sink；
Described electric-field sensor uses two battery lead plates, for gathering the longitudinal electric field data of insulator, to being adopted
The longitudinal electric field data of collection carry out passive filtering and differential amplification processes, and send to data acquisition unit；
Described photoelectric sensor uses reflective photoelectric sensor, is used for sending signal triggering single-chip microcomputer reception and works as
The insulator longitudinal electric field data of front collection；
Described data acquisition unit, for according to the sampled data in each cycle, asks for the longitudinal electric field in each cycle
Data valid, and send to single-chip microcomputer.
Above-mentioned data sink carries out curve for using method of least square to the longitudinal electric field data received
Matching, contrasts the longitudinal electric field data and curves of the curve after matching with acquired original, it is thus achieved that two curves
Between maximum difference, and judge whether obtained maximum difference exceedes the threshold value of setting, the most tested absolutely
The internal existing defects of edge, need to change or keep in repair, and otherwise, insulator is normal.
Above-mentioned insulator charged detection instrument portable unit is provided with probe, and described probe is connected to by data wire
On data acquisition unit.
It is additionally provided with on and off switch on above-mentioned insulator charged detection instrument portable unit, runs instruction device, wireless
MANET data transmit-receive port, clock circuit and LED light.
Above-mentioned data sink includes that insulator charged detection instrument analyzes software and computer, computer and
Analyze software to be used for processing the data that insulator charged detection instrument sends to data sink, by calculating point
Analysis result is by Computer display out.
Further, above-mentioned insulator charged detection instrument portable unit can be fixedly mounted on bracket, described torr
Frame is telescopic bracket, the interior defect of composite insulator in remote live detection ultra-high-tension power transmission line
Situation.
A connection handle it is additionally provided with, for the position of fixing probe, it is simple to translation-angle is examined on above-mentioned bracket
Survey.
The present invention also provides for the configuration of above-mentioned insulator charged detection instrument portable unit, and it includes housing,
Housing forward end is provided with communication antenna, run indicator, power supply indicator, on and off switch, and housing rear end is provided with
Computer line interface.
The beneficial effects of the present invention is: should pass through to carry by interior insulator defect detector based on electric field measurement
Take the distribution of insulator chain longitudinal electric field, judge the interior defect of insulator, profit according to the distribution of insulator longitudinal electric field
Transfer data to the computer of surface personnel with wireless network, data will show in modes such as curves,
Can the interior defect situation of composite insulator in live detection ultra-high-tension power transmission line, identify zero resistance insulator, can be straight
See whether display insulator has interior defect fault, provide conveniently for finding transmission line malfunction insulator,
Improve the reliability of power supply.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of present invention interior insulator based on electric field measurement defect detector；
Fig. 2 is the structural representation of insulator charged detection instrument portable unit of the present invention；
Fig. 3 is the system architecture figure of insulator charged detection instrument portable unit of the present invention；
Fig. 4 is the configuration front-end view of insulator charged detection instrument portable unit of the present invention；
Fig. 5 is the configuration rear end schematic diagram of insulator charged detection instrument portable unit of the present invention；
Fig. 6 is the structural representation of insulator charged detection instrument portable unit bracket of the present invention；
Fig. 7 is the flow chart of present invention interior insulator based on electric field measurement defect detector；
In figure: 1-insulator charged detection instrument portable unit, 2-data sink, 3-single-chip microcomputer, 4-
Electric-field sensor, 5-photoelectric sensor, 6-data acquisition unit, 7-power supply, 8-run instruction device, 9-without
Line MANET data transmit-receive port, 10-clock circuit, 11-LED indicator, 12-bracket, 13-housing, 14-
Communication antenna, 15-run indicator, 16-power supply indicator, 17-on and off switch, 18-computer line interface.
Detailed description of the invention:
Below in conjunction with the accompanying drawings and technical scheme is described in detail by detailed description of the invention.
As shown in FIG. 1 to 3, a kind of interior insulator defect detector based on electric field measurement, including insulation
Subband electro-detection instrument portable unit 1 and data sink 2, described insulator charged detection instrument portable unit
1 is connected by wireless self-networking communication mode with described data sink 2；Described insulator charged detection
Instrument portable unit 1 includes single-chip microcomputer 3, electric-field sensor 4, photoelectric sensor 5 and data acquisition unit 6,
Wherein: described single-chip microcomputer 3 is for carrying out smothing filtering by the longitudinal electric field data valid in each cycle received
Process, and by the way of wireless self-networking communicates will process after data send to data sink 2；
Described electric-field sensor 4 uses two battery lead plates, for gathering the longitudinal electric field data of insulator, to being gathered
Longitudinal electric field data carry out passive filtering and differential amplification and process, and send to data acquisition unit 6；
Described photoelectric sensor 5 uses reflective photoelectric sensor, is used for sending signal triggering single-chip microcomputer 3 reception and works as
The insulator longitudinal electric field data of front collection；Described data acquisition unit 6 is for according to the sampling in each cycle
Data, ask for the longitudinal electric field data valid in each cycle, and send to single-chip microcomputer 3.
Above-mentioned data sink 2 is for using the method for least square longitudinal electric field data march to receiving
Line matching, contrasts the longitudinal electric field data and curves of the curve after matching with acquired original, it is thus achieved that two is bent
Maximum difference between line, and judge whether obtained maximum difference exceedes the threshold value of setting, the most tested
Interior insulator existing defects, need to change or keep in repair, and otherwise, insulator is normal.
Above-mentioned insulator charged detection instrument portable unit 1 is provided with probe, and described probe is connected by data wire
On data acquisition unit 6.
It is additionally provided with power supply 7 on above-mentioned insulator charged detection instrument portable unit 1, runs instruction device 8, wireless
MANET data transmit-receive port 9, clock circuit 10 and LED light 11.
Above-mentioned data sink 2 includes that insulator charged detection instrument analyzes software and computer, computer
And analysis software is for processing the data that insulator charged detection instrument sends to data sink, will calculate
Analysis result is by Computer display out.
As shown in Figure 6, above-mentioned insulator charged detection instrument portable unit 1 can be fixedly mounted on bracket 12,
Described bracket 12 is telescopic bracket, composite insulator in remote live detection ultra-high-tension power transmission line
Interior defect situation；A connection handle it is additionally provided with, for the position of fixing probe, it is simple to angle of transformation on bracket 12
Degree detects.
As shown in Figure 4, Figure 5, the configuration of above-mentioned insulator charged detection instrument portable unit, it includes shell
Body 13, housing 13 front end is provided with communication antenna 14, run indicator 15, power supply indicator 16, power supply are opened
Closing 17, housing 13 rear end is provided with computer line interface 18.
As it is shown in fig. 7, be somebody's turn to do the workflow step of interior insulator defect detector based on electric field measurement such as
Under:
(1) electric-field sensor 4 is used to gather the longitudinal electric field data of insulator, and to the longitudinally electricity gathered
Field data carries out passive filtering and differential amplification processes；
(2) trigger photoelectric sensor 5 when electric-field sensor 4 is close to insulator edge, current electric field is passed
The insulator longitudinal electric field data that sensor 4 is gathered send to data acquisition unit 6；
(3) data acquisition unit 6 is according to the sampled data in each cycle, asks for the longitudinal electric field number in each cycle
According to virtual value, and send to single-chip microcomputer 3；
(4) the longitudinal electric field data valid in each cycle received is carried out the disposal of gentle filter by single-chip microcomputer 3,
And the data after processing by the way of wireless self-networking communicates send to data sink 2；
(5) execution step 1 is to step 5 repeatedly, until all insulators of insulator chain all complete to measure；
(6) data sink 2 uses method of least square that the longitudinal electric field data received are carried out curve plan
Close；
(7) the longitudinal data curve of the curve after matching with acquired original is contrasted, it is thus achieved that two curves it
Between maximum difference；
(8) whether maximum difference exceedes the threshold value of setting？No, insulator is normal；It is, in tested insulator
Portion's existing defects, need to change or keep in repair.
In specific implementation process, this interior insulator defect detector based on electric field measurement is used to detect
Composite insulator internal flaw step is as follows:
(1) after connecting insulator live detection instrument portable unit 1 and data sink 2, by this detection
Instrument is installed on bracket 12, regulates the length of bracket 12, and fixing pops one's head on connection handle, it is simple to during detection
Translation-angle；
(2) on and off switch 17 on insulator charged detection instrument portable unit 1, red power supply indicator are opened
16 is bright, and probe enters waiting state, and on and off switch 17 is connected moment, and green run indicator 15 is dodged once,
Buzzer call one sound；
(3) clicking button, now buzzer call one sound, green light flashes at a slow speed, and probe enters measures shape
State, can start to measure；
(4) probe is put into insulator ground side end, in placement process, does not stop the light of photocell
Road；
(5) probe is close to insulator surface at the uniform velocity smooth sliding to side of wire end along insulator axis；?
In sliding process, photocell often streaks a full skirt, and probe carries out electric field measurement, a buzzer call one
Sound；
(6) probe is fetched, click button, detection of end；Pop one's head in and automatically save data, and return etc.
Treat state；After data have preserved, buzzer can pipe；(during fetching probe, it is impossible to resistance
It is in the light road, for saving power supply, can be with power cutoff after data have preserved, data will not be lost.)
(7) repeat above-mentioned 3rd～6 steps, measure other insulator；
(8) turn off the power supply 7 of insulator charged detection instrument portable unit 1, transmission cable one is terminated calculating
Machine or palm PC serial ports, the computer line interface of another termination insulator charged detection instrument portable unit 1
18, then open probe power supply；
(9) run " insulator charged detecting system " application software, operate by software operation instructions；
(10), after data end of transmission, turn off probe power supply, regain transmission cable.
Claims (8)
1. an interior insulator defect detector based on electric field measurement, it is characterised in that: include insulator
Live detection instrument portable unit (1) and data sink (2), described insulator charged detection instrument is portable
Device (1) is connected by wireless self-networking communication mode with described data sink (2)；Described absolutely
Edge subband electro-detection instrument portable unit (1) includes single-chip microcomputer (3), electric-field sensor (4), photoelectric sensor
(5) and data acquisition unit (6), wherein:
Described single-chip microcomputer (3) for carrying out smooth filter by the longitudinal electric field data valid in each cycle received
Ripple process, and by the way of wireless self-networking communicates will process after data send to data sink
(2)；
Described electric-field sensor (4) uses two battery lead plates, for gathering the longitudinal electric field data of insulator,
The longitudinal electric field data gathered are carried out passive filtering and differential amplification processes, and send to data acquisition list
In unit (6)；
Described photoelectric sensor (5) uses reflective photoelectric sensor, is used for sending signal and triggers single-chip microcomputer
(3) the current insulator longitudinal electric field data gathered are received；
Described data acquisition unit (6) is for according to the sampled data in each cycle, asking for the vertical of each cycle
To electric field data virtual value, and send to single-chip microcomputer (3).
Interior insulator defect detector based on electric field measurement the most according to claim 1, its feature
It is: the longitudinal electric field data received are entered by described data sink (2) for using method of least square
Row curve matching, contrasts the longitudinal electric field data and curves of the curve after matching with acquired original, it is thus achieved that
Maximum difference between two curves, and judge whether obtained maximum difference exceedes the threshold value of setting, the most then
Tested interior insulator existing defects, need to change or keep in repair, and otherwise, insulator is normal.
Interior insulator defect detector based on electric field measurement the most according to claim 1, its feature
It is: described insulator charged detection instrument portable unit (1) is provided with probe, and described probe passes through data wire
It is connected on data acquisition unit (6).
Interior insulator defect detector based on electric field measurement the most according to claim 3, its feature exists
In: be additionally provided with on described insulator charged detection instrument portable unit (1) power supply (7), run instruction device (8),
Wireless self-networking data transmit-receive port (9), clock circuit (10) and LED light (11).
Interior insulator defect detector based on electric field measurement the most according to claim 1, its feature
It is: described data sink (2) includes that insulator charged detection instrument analyzes software and computer, meter
Calculation machine and analysis software, will for processing the data that insulator charged detection instrument sends to data sink
Calculation results is by Computer display out.
Interior insulator defect detector based on electric field measurement the most according to claim 4, its feature
It is: described insulator charged detection instrument portable unit (1) can be fixedly mounted on bracket (12), described
Bracket (12) is telescopic bracket.
Interior insulator defect detector based on electric field measurement the most according to claim 6, its feature
It is: described bracket is additionally provided with a connection handle on (12), for the position of fixing probe.
Interior insulator defect detector based on electric field measurement the most according to claim 1, its feature exists
In: described insulator charged detection instrument portable unit (1) includes that housing (13), housing (13) front end set
There are communication antenna (14), run indicator (15), power supply indicator (16), on and off switch (17), shell
Body (13) rear end is provided with computer line interface (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610353619.XA CN105954656A (en) | 2016-05-25 | 2016-05-25 | Electric field measurement based internal defect detector for insulators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610353619.XA CN105954656A (en) | 2016-05-25 | 2016-05-25 | Electric field measurement based internal defect detector for insulators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105954656A true CN105954656A (en) | 2016-09-21 |
Family
ID=56909613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610353619.XA Pending CN105954656A (en) | 2016-05-25 | 2016-05-25 | Electric field measurement based internal defect detector for insulators |
Country Status (1)
| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107608375A (en) * | 2017-09-13 | 2018-01-19 | 广西电网有限责任公司北海供电局 | Faulty insulator detecting system and method based on unmanned plane |
| CN107807315A (en) * | 2017-10-31 | 2018-03-16 | 国网安徽省电力公司电力科学研究院 | Testing device for insulation defect and method for electrical equipment |
| CN114200239A (en) * | 2021-12-10 | 2022-03-18 | 清华大学 | Method for online monitoring failure of insulator monomer in insulator string in power system |
| CN117572102A (en) * | 2024-01-17 | 2024-02-20 | 中国电力科学研究院有限公司 | Insulator detection system and method based on space electric field sensing technology |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107608375A (en) * | 2017-09-13 | 2018-01-19 | 广西电网有限责任公司北海供电局 | Faulty insulator detecting system and method based on unmanned plane |
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| CN107807315B (en) * | 2017-10-31 | 2023-12-19 | 国网安徽省电力公司电力科学研究院 | Method for detecting insulation defects of electrical equipment |
| CN114200239A (en) * | 2021-12-10 | 2022-03-18 | 清华大学 | Method for online monitoring failure of insulator monomer in insulator string in power system |
| CN117572102A (en) * | 2024-01-17 | 2024-02-20 | 中国电力科学研究院有限公司 | Insulator detection system and method based on space electric field sensing technology |
| CN117572102B (en) * | 2024-01-17 | 2024-04-16 | 中国电力科学研究院有限公司 | Insulator detection system and method based on space electric field sensing technology |
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Application publication date: 20160921 |
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