CN206431236U - A kind of utilization photoelectricity field sensor detects the detecting system of defects of insulator - Google Patents
A kind of utilization photoelectricity field sensor detects the detecting system of defects of insulator Download PDFInfo
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- CN206431236U CN206431236U CN201621457813.4U CN201621457813U CN206431236U CN 206431236 U CN206431236 U CN 206431236U CN 201621457813 U CN201621457813 U CN 201621457813U CN 206431236 U CN206431236 U CN 206431236U
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- 239000012212 insulator Substances 0.000 title claims abstract description 140
- 230000005622 photoelectricity Effects 0.000 title claims abstract description 46
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- 230000005684 electric field Effects 0.000 claims abstract description 87
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 230000003287 optical effect Effects 0.000 claims abstract description 4
- 238000009413 insulation Methods 0.000 claims description 12
- 239000000523 sample Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 3
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- 230000008859 change Effects 0.000 abstract description 23
- 238000000034 method Methods 0.000 abstract description 23
- 238000005259 measurement Methods 0.000 abstract description 12
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000001035 drying Methods 0.000 abstract description 3
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- 238000012360 testing method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
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- 239000000725 suspension Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000005697 Pockels effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
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Abstract
The utility model discloses the detecting system that a kind of utilization photoelectricity field sensor detects defects of insulator, including photoelectricity field sensor, hoistable platform and electric field measuring apparatus, the photoelectricity field sensor is arranged on the hoistable platform and is connected with the electric field measuring apparatus, and the optical electric field sensor arrangement is around insulator chain.The utility model has the advantage of：Instrument is simple, requires very low to external environments such as weather, measurement point is more；Method of the present utility model has the advantages that to be not required to contact insulator chain simultaneously, to be not required to step on tower, detection time short, and instead of part with calculating and measure work, therefore workload is smaller, is conducive to the use of operation maintenance personnel；The change of other environment temperature does not influence the judgement that insulator is deteriorated, in the case of drying, and the filth of insulator surface does not influence the judgement that insulator is deteriorated.
Description
Technical field
The utility model is related to a kind of system for detecting defects of insulator, and in particular to one kind utilizes the inspection of photoelectricity field sensor
The system for surveying defects of insulator.
Background technology
With modern age power industry constantly towards large-sized unit, Large Copacity and it is high-tension develop rapidly, service condition is more
Harshness, ratio of defects gradually increases, and in order to ensure safety, the economical operation of generating and power transmission and transformation system, domestic and international power industry is general
Higher and higher requirement is proposed all over the reliability to power equipment, as the important component of power transmission and transformation system, to insulation
On-line checking, the defect diagonsis of sub- running status are particularly important.To solve the test problems of Faulty insulator, grind both at home and abroad
A variety of detection methods are studied carefully, the conventional means of detection high voltage power transmission line composite insulator defect is respectively at present：
First, estimated with binoculars, because the size of general defect is smaller, and need the ability from certain angle
See, it is only less reliable from ground observation, therefore it is required that tower detection is stepped on, in addition, interior insulation failure is only difficult to find by observation.
2nd, the method for the low null value suspension insulator of another Site Detection ultra-high-tension power transmission line, common tool is spark fork,
Two metal contacts for pitching spark during detection are overlapped with the iron pin and chapeau de fer of insulator respectively, if insulator dielectric is functional,
Then insulator pressure-bearing is breakdown, produces spark discharge.Operating personnel judge whether insulator is good according to spark discharge sound, should
Method is limited by background noise, it is impossible to monitor distant insulating, and the short-circuit good insulation period of the day from 11 p.m. to 1 a.m can produce danger, it is impossible to examine
Survey composite insulator.
3rd, the sound wave that sonic method detection is sent by insulator shelf depreciation, its sensitivity is less than infrared imaging method.In reality
In the detection process of border, corona often occurs for high-pressure side gold utensil, and produced background noise can flood defects of insulator and be sent
Sound wave.
4th, IR thermometry, the damage of the insulating materials as caused by electric field is most relevant with temperature.Shelf depreciation,
Dielectric loss or resistance loss when leakage current flows through megohmite insulant can cause insulator local temperature to raise.This method
Affected by environment larger, the interference of the sun and background radiation, spectral emissivity e's is selected, and focusing situation, meteorological condition etc. are
Testing result can be impacted.
Therefore, it is also somewhat limited in the practical application of detection high voltage power transmission line composite insulator defect.
The content of the invention
The purpose of this utility model seeks to provide the system that a kind of utilization photoelectricity field sensor detects defects of insulator,
Its is simple to operate, accurate using extensive, detection.
To achieve the above object, a kind of utilization photoelectricity field sensor designed by the utility model detects defects of insulator
Detecting system, including photoelectricity field sensor, hoistable platform and electric field measuring apparatus, the photoelectricity field sensor are arranged on the lifting
It is connected on platform and with the electric field measuring apparatus, and the optical electric field sensor arrangement is around insulator chain.
Further, the hoistable platform includes dead ring, insulating bar and insulating cord, and the dead ring is fixed on described exhausted
The top of edge bar, one end of the insulating cord is connected through the dead ring and with the photoelectricity field sensor.
Further, each piece insulator umbrella edge of the probe of the photoelectricity field sensor into insulator chain away from
From identical.
As preference, the photoelectricity field sensor measures the electric field around insulator chain in tri- directions of X, Y and Z simultaneously
The electric field value in tri- directions of value and synthesis X, Y and Z.
A kind of method that utilization photoelectricity field sensor detects defects of insulator, comprises the following steps：
1) photoelectricity field sensor is arranged around insulator chain；
2) along insulator chain moving photoconductor field sensor, and recording light electric-field sensor is multiple default around insulator chain
The electric field value that point is measured；
3) defect situation of insulator in insulator chain is judged according to the electric field value of multiple presets.
Further, the step 2 specifically,
2.1) confirm that photoelectricity field sensor arranges errorless around insulator chain；
2.2) by the first insulator full skirt of the alignment probe insulator chain high-pressure side of photoelectricity field sensor, and along insulation
To low-pressure end moving photoconductor field sensor, and successively, recording light electric-field sensor is measured the high-pressure side of substring in multiple presets
First electric field value；
2.3) along the low-pressure end of insulator chain to high-pressure side moving photoconductor field sensor, and recording light electric-field sensor successively
The second electric field value measured in multiple presets；
2.4) the first electric field value of multiple presets is subjected to average computation with the second electric field value of corresponding preset respectively,
Obtain the electric field value of multiple presets.
Further, the step 2.1 is specially：
2.1) photoelectricity field sensor is moved at the high-pressure side of insulator chain, whether the high-pressure side of observation insulator chain has
Electric discharge or abnormal corona phenomenon, if not discharging or abnormal corona phenomenon, photoelectricity field sensor is around insulator chain
Arrangement is errorless.
As preference, the step 3 is specially：
3) insulator chain surrounding electric field strength distribution curve is drawn according to the electric field value of multiple presets, judges insulator chain
The defect situation of middle insulator, the insulator chain surrounding electric field strength distribution curve is that the electric field of insulator chain space axial direction becomes
Rate curve.
As preference, the step 3 is specially：
3) insulator chain surrounding electric field strength distribution curve is drawn according to the electric field value of multiple presets, judges insulator chain
The defect situation of middle insulator, the insulator chain surrounding electric field strength distribution curve is that the electric field of insulator chain space axial direction becomes
Rate curve, the electric field value of multiple presets is entered using finite element stimulation method to the electric field distribution law of insulator chain
Row simulation analysis, judge the defect situation of insulator in insulator chain.
As preference, the number of the preset is 13.
The utility model has the advantage of：It can be in Faulty insulator to the axial far-reaching basis of electric field component in space
A kind of upper axial electric field distribution situation detection Faulty insulator for proposing utilization photoelectricity field sensor measurement insulator chain surface
Method, Faulty insulator and its position are can interpolate that out by the change of Direct Analysis insulator chain space axial electric field.This reality
It is relatively simple with new method instrument, very low is required to external environments such as weather, measurement point is more；This practicality simultaneously is new
The method of type has the advantages that to be not required to contact insulator chain, to be not required to step on tower, detection time short, and instead of with calculating part measurement
Work, therefore workload is smaller, is conducive to the use of operation maintenance personnel；In addition in method of the present utility model, environment temperature
The change of degree does not influence the judgement that insulator is deteriorated, in the case of drying, and the filth of insulator surface does not influence insulator bad
The judgement of change.
Brief description of the drawings
Fig. 1 is use state schematic diagram of the present utility model；
Fig. 2 is method and step schematic diagram of the present utility model；
Fig. 3 is good insulation substring and the curve schematic diagram of the Electric Field Distribution relation of Faulty insulator string；
Experiments and simulation result figure of the Fig. 4 for cleaning insulator chain；
Experiments and simulation result figure of the Fig. 5 for Faulty insulator string.
In figure：Photoelectricity field sensor 1, hoistable platform 2, electric field measuring apparatus 3, insulator chain 4, dead ring 5, insulating bar 6,
Insulating cord 7.
Embodiment
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings：
Utilization photoelectricity field sensor as shown in Fig. 1~2 detects the detecting system of defects of insulator, including optical electric field sensing
Device 1, hoistable platform 2 and electric field measuring apparatus 3, the photoelectricity field sensor 1 be arranged on the hoistable platform 2 on and with the electric field
Measuring instrument 3 is connected, and the photoelectricity field sensor 1 is arranged in around insulator chain 4.The hoistable platform 2 includes dead ring
5th, insulating bar 6 and insulating cord 7, the dead ring 5 are fixed on the top of the insulating bar 6, and one end of the insulating cord 7 passes through institute
State dead ring 5 and be connected with the photoelectricity field sensor 1.Each into insulator chain 4 of the probe of the photoelectricity field sensor 1
The distance at insulator umbrella edge is identical.The photoelectricity field sensor 1 is measured around insulator chain 4 in X, Y and Z tri- simultaneously
The electric field value in tri- directions of electric field value and synthesis X, Y and Z in direction.
A kind of method that utilization photoelectricity field sensor detects defects of insulator, comprises the following steps：
1) photoelectricity field sensor 1 is arranged around insulator chain 4；
2) along the moving photoconductor field sensor 1 of insulator chain 4, and recording light electric-field sensor 1 is multiple around insulator chain 4
The electric field value that preset is measured, the number of the preset is 13；
2.1) confirm that photoelectricity field sensor 1 is arranged around insulator chain 4 errorless：Photoelectricity field sensor 1 is moved to absolutely
At the high-pressure side of edge substring 4, whether the high-pressure side of observation insulator chain 4 has electric discharge or abnormal corona phenomenon, if not discharging
Or abnormal corona phenomenon, then photoelectricity field sensor 1 arranged around insulator chain 4 errorless；
2.2) by the first insulator full skirt of the high-pressure side of alignment probe insulator chain 4 of photoelectricity field sensor 1, and along exhausted
The high-pressure side of edge substring 4 to low-pressure end moving photoconductor field sensor 1, and successively recording light electric-field sensor 1 in multiple presets
First electric field value of measurement；
2.3) along the low-pressure end of insulator chain 4 to high-pressure side moving photoconductor field sensor 1, and recording light electric field sensing successively
The second electric field value that device 1 is measured in multiple presets；
2.4) the first electric field value of multiple presets is subjected to average computation with the second electric field value of corresponding preset respectively,
Obtain the electric field value of multiple presets.
3) defect situation of insulator in insulator chain 4 is judged according to the electric field value of multiple presets：According to multiple default
The electric field value of point draws the surrounding electric field strength distribution curve of insulator chain 4, judges the defect situation of insulator in insulator chain 4,
The surrounding electric field strength distribution curve of insulator chain 4 is the electric field change rate curve of the space of insulator chain 4 axial direction, will be multiple
The electric field value of preset carries out simulation analysis using finite element stimulation method to the electric field distribution law of insulator chain 4, sentences
The defect situation of insulator in disconnected insulator chain 4.
Embodiment 1：
During detection, photoelectric sensor 1 is fixed on from the surface of insulator chain 4 by dead ring 5, insulating bar 6 and insulating cord 7
At a certain distance from, it is ensured that photoelectric sensor 1 can be synchronized with the movement with insulating cord 7, and photoelectric sensor 1 is surveyed by optical fiber and electric field
Amount instrument 3 is connected.Photoelectricity field sensor 1 is a kind of sensor based on Pockels effects, and side uses the electric light of good insulation preformance
Crystal is used as sensing element；Signal transmission passage is used as by the high optical fiber of dielectric strength, its insulation system is greatly simplified,
Simultaneously without unshakable in one's determination and coil, the problems such as in the absence of magnetic saturation, ferromagnetic resonance, measurement accuracy can be improved.
A kind of principle of the method design of utilization photoelectricity field sensor detection defects of insulator of the utility model is as follows：
Fig. 3 is good insulation substring and the curve schematic diagram of the Electric Field Distribution relation of Faulty insulator string, and transverse axis is insulation
The position of substring, from left to right for from the low-pressure end of insulator chain to high-pressure side, the longitudinal axis is electric-field intensity, provides a song above
Line is curve A, below curve be curve B；Curve B is the electric-field intensity that is calculated according to Theory of Electromagnetic Field along good exhausted
Edge substring axial direction change curve, under normal circumstances the curve be it is smooth, it is " U "-shaped；Lack when insulator chain has conduction
(see the circle in Fig. 3) when falling into, the current potential of fault location is changed into a constant, because electric-field intensity is rate of change of the current potential along length,
Therefore the electric-field intensity of fault location will be reduced suddenly, and the Electric Field Distribution curve made is also no longer smooth, but in corresponding position
On have distortion, the curve A seen in Fig. 3, what curve A was presented is shaped as " centre sink, two ends rise ".
This specific embodiment simulates the practical operation situation of 220kV circuits, and added alternating voltage virtual value is 127.0kV,
Analog conducting wire length 5.0m, the insulaion resistance of experiment low resistance insulator string used is 40M Ω, and Zero resistance insulator string is short using ground wire
Road steel pin steel cap is simulated, probe of the short circuit ground wire back to photoelectricity field sensor during measurement.
D is electric field measurement reference line or witness mark in experiments and simulation result figure of the Fig. 4 for cleaning insulator chain, figure
To the distance of insulator chain axis.The insulator numbering of high-pressure side to low-pressure end is followed successively by No.1~No.13.As shown in Figure 4,
Measured value is slightly more relatively low than calculated value at most of positions, but both changing rules coincide substantially.Thus prove, using having
It is feasible that the first emulated computation method of limit carries out simulation analysis to the electric field distribution law of porcelain insulating substring.
The utility model is with the axial electric field change rate σ in spacei,jAnalysis deteriorates position and its space electric field is changed apart from d
Influence, its expression formula is：
σi,j=Δ Ei,j,f-ΔEi,S/ΔEi
In formula：I is each insulator position；J is Faulty insulator position (i, j=1~13)；F is represented containing bad
Change the insulator chain of insulator；S represents good insulation substring.
Fig. 5 is the influence of Faulty insulator position respectively to the axial electric field change rate in space as d=0.3 and 0.5m, can
To find out that result of the test is basically identical with simulation result.Faulty insulator influences maximum to the axial electric field component in space, measurement away from
From more remote, the rate of change of its space axial electric field is smaller；When Faulty insulator is located proximate to high-pressure side, its space axial electric field becomes
Rate increase, its space electric field rate of change is minimum when in the middle part of insulator chain and is held essentially constant；Close to low-pressure end when its
Space electric field rate of change increased again.As d=0.30m, field minimum rate of change is 0.13；It is minimum as d=0.50m
Electric field change rate is 0.04.It can be seen that with the increase apart from d, the space electric field rate of change at Faulty insulator position gradually subtracts
It is small.Sensing head apart from insulator 10cm or within, the Electric Field Distribution curve that measures is close to theoretical U-shaped distribution, Er Qiefei
Ordinary light is slided.
Table 1
If table 1 is the No.11 as d=0.3m, No.12, the axial electric field change rate in space of No.13 insulators.Can by table 1
Know, when Faulty insulator any position in string, the rate of change of 3 insulator surrounding space axial electric fields of cross-arm side is substantially steady
It is fixed, and the axial electric field change rate in space of at least 2 is more than 5.0% in 3.Based on the thought of sensitive insulator method, this reality
It is sensitive insulator group with new 3 insulators of definition cross-arm side, passes through the axial electric field change in the space for measuring this 3 insulators
Rate, so that it may judge whether contain zero resistance insulator in insulator chain.Therefore, only needed for 220kV circuits suspension insulator
Whether analyze the axial electric field change rate in 3 insulator spaces of low-pressure end can judge in insulator chain containing null value insulation
Son.
The utility model proposes a kind of utilize on the basis of Faulty insulator is far-reaching to the axial electric field component in space
The method that the axial electric field distribution situation on photoelectricity field sensor measurement insulator chain surface detects Faulty insulator, by directly dividing
The change of analysis insulator chain space axial electric field can interpolate that out Faulty insulator and its position.Used in method of the present utility model
Instrument is relatively simple, requires very low to external environments such as weather, measurement point is more；Method of the present utility model has and is not required to simultaneously
Contact insulator chain, it is not required to step on the short advantage of tower, detection time, and instead of with calculating part measurement work, therefore workload
It is smaller, be conducive to the use of operation maintenance personnel；In addition in method of the present utility model, the change of environment temperature does not influence absolutely
The judgement of edge deterioration, in the case of drying, the filth of insulator surface does not influence the judgement that insulator is deteriorated.
Finally it is pointed out that above example is only the more representational example of the utility model.Obviously, this practicality is new
Type is not limited to above-described embodiment, can also there is many deformations.It is all according to technical spirit of the present utility model to above example institute
Any simple modifications, equivalents, and modifications done, are considered as belonging to protection domain of the present utility model.
Claims (4)
1. a kind of utilization photoelectricity field sensor detects the detecting system of defects of insulator, it is characterised in that：Including optical electric field sensing
Device (1), hoistable platform (2) and electric field measuring apparatus (3), the photoelectricity field sensor (1) are arranged on the hoistable platform (2) simultaneously
It is connected with the electric field measuring apparatus (3), and the photoelectricity field sensor (1) is arranged in around insulator chain (4).
2. utilization photoelectricity field sensor according to claim 1 detects the detecting system of defects of insulator, it is characterised in that：
The hoistable platform (2) includes dead ring (5), insulating bar (6) and insulating cord (7), and the dead ring (5) is fixed on the insulation
The top of bar (6), one end of the insulating cord (7) is connected through the dead ring (5) and with the photoelectricity field sensor (1).
3. utilization photoelectricity field sensor according to claim 2 detects the detecting system of defects of insulator, it is characterised in that：
The distance at probe to each insulator umbrella edge in insulator chain (4) of the photoelectricity field sensor (1) is identical.
4. the utilization photoelectricity field sensor according to any one in claims 1 to 3 detects the detection system of defects of insulator
System, it is characterised in that：The photoelectricity field sensor (1) is while measure the electricity around insulator chain (4) in tri- directions of X, Y and Z
The electric field value in tri- directions of field value and synthesis X, Y and Z.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106771924A (en) * | 2016-12-28 | 2017-05-31 | 国网内蒙古东部电力有限公司检修分公司 | A kind of utilization photoelectricity field sensor detects the detecting system and method for defects of insulator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106771924A (en) * | 2016-12-28 | 2017-05-31 | 国网内蒙古东部电力有限公司检修分公司 | A kind of utilization photoelectricity field sensor detects the detecting system and method for defects of insulator |
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