CN102565577A - Method for detecting high optical spectrum of composite insulator - Google Patents
Method for detecting high optical spectrum of composite insulator Download PDFInfo
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- CN102565577A CN102565577A CN2011104195768A CN201110419576A CN102565577A CN 102565577 A CN102565577 A CN 102565577A CN 2011104195768 A CN2011104195768 A CN 2011104195768A CN 201110419576 A CN201110419576 A CN 201110419576A CN 102565577 A CN102565577 A CN 102565577A
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Abstract
The invention provides a method for detecting a high optical spectrum of a composite insulator. The method comprises the following steps of: 1) adopting a hyperspectral imager to perform imaging on the composite insulator, and obtaining a high optical spectrum image of the composite insulator; 2) carrying out pretreatment on the high optical spectrum image of the composite insulator, wherein the pretreatment comprises geometric correction and radiometric correction, and obtaining precise spectral information; and 3) using a special analysis platform to carry out treatment analysis, determining a running state of the composite insulator, judging result output /display, and judging whether the composite insulator needs to be replaced. The method for detecting the high optical spectrum of the composite insulator provided by the invention can carry out non-contacting type detection on the composite insulator, and a worker does not need to climb a tower; and the site operation required time is short, when the high hyperspectral imager obtains data, the information of multiple composite insulators is obtained at the same time, thereby being convenient for late stage treatment analysis on the multiple composite insulators simultaneously, achieving the purpose of batch detection, and meeting the requirements of composite insulator state detection of China.
Description
Technical field
The present invention relates to the composite insulator detection method, belong to power transmission and transforming equipment running status maintenance field, relate in particular to the high spectral method of detection of a kind of composite insulator, can be used for the running status of on-the-spot charged detection composite insulator.
Background technology
The eighties in 20th century, China experts and scholars have launched the research and development to composite insulator on the basis of drawing external experience, and mid-term, sample dropped into trial run the latter stage eighties.At the beginning of the nineties, pollution flashover accident appears in various places in succession, because anti-pollution characteristic is good, composite insulator is dropped into hangs the net use.To the end of the year 1994, the composite insulator of hanging net operation reaches 50,000.Since then, composite insulator networking quantity rapidly increases: nineteen ninety-five is 100,000, and 1998 is 460,000, and calendar year 2001 is 1,600,000, and hanging net operation had reached 3,000,000 in 2005.By in Dec, 2010, the 66kV of State Grid Corporation of China's administration and above electric pressure circuit account for electric pressure circuit all types of the same race at 37.02% of fortune insulator number at fortune composite insulator number.
Along with using year number to increase, the composite insulator degree of aging increases, and the damage of composite insulator in recent years, flashover fault increase.In service at actual track, owing to receive the influence of electric field, mechanical force, atmospheric environment etc., the spun glass in the composite electric insulator core bar is easy to generate mechanical fatigue, and cluster parachute and sheath material can wear out, and becoming flexible also can appear in end gold utensil and plug junction.Therefore, when improving the composite insulator manufacturing process, improving the compound inslation protonatomic mass, be necessary to study the technology that detects composite insulator.
At present, the detection method of composite insulator has both at home and abroad: direct observational method, ultraviolet imagery method, infrared thermal imagery thermometry, supercritical ultrasonics technology, laser Doppler method, electric field measurement method, leakage current measurement method, pulse current method.Direct observational method is through observing under tower to find common surface imperfection with binoculars; It is the most frequently used method of inspection composite insulator external physical defective; But ground observation is clear inadequately, and artificially observation has certain subjectivity, and operating efficiency and security are low.The ultraviolet imagery method can detect with write down wet environment in due to the surface contamination discharge, corrosion or install and be connected the forceful electric power corona on gold utensil, the grading ring due to improper; The shelf depreciation state need take place during detection; To in normal temperature, high humidity environment, carry out; And checkout equipment costs an arm and a leg, function singleness, and testing result receives the influence of viewing angle easily.The insulator local temperature that dielectric loss when the infrared thermal imagery thermometry can detect the shelf depreciation leakage current and flows through megohmite insulant or ohmic loss etc. cause raises, but the instrument cost is high, and temperature survey receives the influence of factors such as the sun, wind, atmospheric environment.Ultrasonic generator emission initial pulse gets into the composite insulator medium, when insulator has the crack, can reflect at the place, crack, refraction and mode conversion, through to receiving to such an extent that ultrasound wave is handled the composite insulator that can detect cracking accurately.Supercritical ultrasonics technology is safe and reliable, but ultrasound wave itself exists coupling and decay, is not suitable for on-the-spot the detection, mainly is used to laboratory qualification.Laser Doppler method also can detect the composite insulator of cracking, but inoperative to uncracked composite insulator, and equipment volume is huge, is not suitable for field work.The electric field measurement method distributes through the axial electric field of measuring the compound inslation substring can find out the interior insulation conduction fault of composite insulator; Environmental requirement is low to external world during measurement; But need step on tower when detecting instrument is slided one time along the compound inslation sub-surface, and can not detect the external insulation defective of cluster parachute breakage and so on.The leakage current measurement method is to detect the pollution level of composite insulator through the size variation of measuring leakage current, and composite insulator is aging to be deepened, and flashover voltage reduces, and leakage current raises; The leakage current measurement method receives factor affecting such as electric pressure, composite insulator model, environment, can not accurately reflect the composite insulator degradation, and the cost that detects is high.Pulse current method is according to the phenomenon that exists the increasing of deterioration compound inslation period of the day from 11 p.m. to 1 a.m corona pulse number, amplitude to increase on the circuit; Judge the insulation status of composite insulator through measuring the corona pulse method of current, difficult point is extraction and the identification of Selection of Sensor, signal, the on-the-spot eliminating of disturbing.
The bibliographical information of relevant this respect for example application number is the utility model patent of the charged detector of liquid crystal graphic presentation high voltage composite insulators by name of 200520006400.X; A kind of device of charged detection high voltage composite insulators defective is disclosed, can identification tape reply to come to nothing in conductive defect, the inside of closing insulator by cable and the compound inslation substring in low null value insulation.Yet above-mentioned patent does not relate to the detection method of aging, hydrophobic nature, be full of cracks and the degradation etc. of on-the-spot charged detection composite insulator.
In sum, the most function singleness of existing composite insulator detection method, and more condition restriction is arranged when using, be difficult to detect the deterioration composite insulator in the working line.At present, the detection of composite insulator both at home and abroad also is in the research and development stage, does not have ripe method, needs research to be fit to the detection method of hanging net operation composite insulator.
In view of this, be necessary to provide a kind of composite insulator high spectral method of detection, running status that can on-the-spot charged detection composite insulator, and the method for aging, hydrophobic nature, be full of cracks and the degradation etc. of composite insulator being carried out check and analysis.
Summary of the invention
Technical matters to be solved by this invention is: to the deficiency that prior art exists, provide a kind of composite insulator on-the-spot charged detection method, adopt novel information technology---high-spectrum remote-sensing, detect the running status of composite insulator in the working line; The mode that this method is obtained data is convenient, and is simple to operate, can in time find the composite insulator of deterioration, the safe operation of protection electrical network.
The technical scheme that the present invention adopted is: the high spectral method of detection of a kind of composite insulator, it is characterized in that, and may further comprise the steps:
1) adopt hyperspectral imager that composite insulator is formed images; Obtain the Hyperspectral imaging of composite insulator, its process is: after the scanner of hyperspectral imager obtained the information of composite insulator, light was through behind the object lens; Pass slit, collimating mirror, dispersion element successively; The incident light of each wave band is carried out high-precision beam split, project the diverse location imaging on the detector, obtain the image of different-waveband; Detector changes the emittance of collecting into chemical energy or electric energy is stored, and by processor the signal of collecting is carried out signal amplification, encoding process then, exports Hyperspectral imaging at last;
2) Hyperspectral imaging to composite insulator carries out pre-service, comprises that geometry correction, radiant correction are to obtain comparatively accurate spectral information;
3) carry out Treatment Analysis with the specialty analysis platform, confirm the running status of composite insulator, result of determination output/demonstration judges whether to need to change composite insulator.
The high spectral method of detection of aforesaid composite insulator is characterized in that: step 2) in, the Hyperspectral imaging that obtains is whole transmission line of electricity, also should carry out the identification of composite insulator, from complicated background, extracts composite insulator.
The high spectral method of detection of aforesaid composite insulator is characterized in that: said specialty analysis platform comprises the degradation that identification, the quantitative test of composite insulator degree of aging, composite insulator hydrophobic nature are judged, composite insulator chaps degree analyzing, composite insulator of Hyperspectral imaging pre-service, composite insulator and analyzes six big modules.
The invention has the beneficial effects as follows: the high spectral method of detection of composite insulator of the present invention can be carried out non-contact detection to composite insulator, does not need workman Deng Ta; Under the situation of the normal operation of disturbing line not, the present invention needn't dismantle composite insulator, can the operating composite insulator of on-the-spot charged detection, and the execute-in-place required time is short; When obtaining data with hyperspectral imager, can obtain the information of a plurality of composite insulators simultaneously, being convenient to the later stage carries out Treatment Analysis to a plurality of composite insulators simultaneously, reaches the purpose of batch detection, satisfies the demand of China's composite insulator state-detection.
Description of drawings
Fig. 1 is the module map of the high spectral method of detection of composite insulator of the embodiment of the invention.
Fig. 2 obtains the theory diagram of composite insulator spectral information for hyperspectral imager among Fig. 1.
Fig. 3 is the schematic diagram that hyperspectral imager forms images to composite insulator among Fig. 2.
Fig. 4 is the processing flow chart of specialty analysis platform of the high spectral method of detection of composite insulator of the embodiment of the invention.
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to following embodiment.Those skilled in the art can do various changes or modification to the present invention, and these equivalent form of values are equally within the listed claims limited range of the application.
Description of symbols in the accompanying drawing: 1-hyperspectral imager, 2-composite insulator, 3-Hyperspectral imaging, 4-analysis platform, the output/demonstration of 5-result of determination; 2.1-sunshine or other light source, 2.2-atmospheric envelope, 3.1-scanner, 3.2-object lens, 3.3-slit; 3.4-collimating mirror, 3.5-dispersion element, 3.6-lens, 3.7-detector; 3.8-processor, 3.9-follower, the pre-service of 4.1-Hyperspectral imaging, the identification of 4.2-composite insulator; 4.3-the quantitative test of composite insulator degree of aging, 4.4-composite insulator hydrophobic nature are judged, 4.5-composite insulator be full of cracks degree analyzing, the degradation analysis of 4.6-composite insulator.
Principle of work of the present invention: according to the situation of operation, the problem that composite insulator occurs mainly is cluster parachute material embrittlement, sclerosis, efflorescence, cracking, and the shelf depreciation situation appears in insulating surface, and hydrophobicity performance weakens; The sheath cracking, plug is corroded after exposing, and physical strength descends.The composite insulator of different running statuses has the different spectrum characteristic, can analyze the running status of composite insulator according to the spectral characteristic of composite insulator respective pixel on the Hyperspectral imaging.Problems such as material ageing, be full of cracks, hydrophobic nature forfeiture appear in composite insulator easily, can be through above analysis of phenomenon being judged the degradation of composite insulator.
Fig. 1 is an embodiment of the invention module map; The high spectral method of detection of composite insulator provided by the invention, at first with 1 pair of hyperspectral imager in 2 imagings of fortune composite insulator, obtain its Hyperspectral imaging 3; Carry out Treatment Analysis with specialty analysis platform 4 then; Confirm the running status of composite insulator, result of determination output/demonstration 5 judges whether to need to change composite insulator.
Solar radiation from the near ultraviolet to the middle infrared between energy the most concentrated and relatively stable; And the electromagnetic radiation in this wave band interval is less through atmospheric decay, and the energy that high spectrum sensor receives mainly is that the composite insulator reflection sun is at the interval electromagnetic wave energy of this wave band.
Fig. 2 obtains the theory diagram of composite insulator spectral information for hyperspectral imager among Fig. 1; When high spectrum sensor is carried out to picture to composite insulator; The energy that gets into high spectrum sensor mainly comprises two parts: sunshine or other light source get into the energy of high spectrum sensor after the composite insulator reflection, sunshine or other light source get into the energy of high spectrum sensor after atmospheric reflectance, transmission, absorption.Under the identical conditions; The composite insulator of different running statuses is different in the situation of the reflection of different-waveband; Cause getting into the emittance difference of high spectrum sensor; Therefore demonstrate the different spectrum characteristic, can analyze the running status of composite insulator according to the spectral characteristic of composite insulator respective pixel on the Hyperspectral imaging.
Fig. 3 is the principle of high spectrum sensor to the composite insulator imaging; After the scanner 3.1 of high spectrum sensor obtains the information of composite insulator 1; Light passes slit 3.3, collimating mirror 3.4, dispersion element 3.5 successively through behind the object lens 3.2, and the incident light of each wave band is carried out high-precision beam split; Project the diverse location imaging on the detector, obtain the image of different-waveband.Detector 3.7 changes the emittance of collecting into chemical energy or electric energy is stored, and the signal by 3.8 pairs of collections of processor carries out processing such as signal amplification, coding then, exports Hyperspectral imaging 3 at last.When hyperspectral imager forms images at the space characteristics to composite insulator, also each space pixel is formed a lot of narrow wave bands through chromatic dispersion, spectral resolution is high, and spectral coverage is wide.Hyperspectral imaging as shown in the figure is made up of the image of tens of even hundreds of wave bands, not only comprises the spatial information of composite insulator, also has its spectral information.
Analysis platform 4 should comprise the degradation that identification, the quantitative test of composite insulator degree of aging, composite insulator hydrophobic nature are judged, composite insulator chaps degree analyzing, composite insulator of Hyperspectral imaging pre-service, composite insulator and analyze six big modules.This professional software can provide the reading of Hyperspectral imaging, demonstration, hold function, provides the pretreated function of Hyperspectral imaging, and the analytic function to the composite insulator degradation is provided.
Judge that with analysis platform 4 flow process of composite insulator degradation is as shown in Figure 4.After obtaining Hyperspectral imaging, at first need carry out Hyperspectral imaging pre-service 4.1, comprise that geometry correction, radiant correction are to obtain comparatively accurate spectral information.The Hyperspectral imaging that obtains is whole transmission line of electricity, also should carry out the identification 4.2 of composite insulator, from complicated background, extracts composite insulator.Spectral information to the composite insulator respective pixel carries out feature extraction then, composite insulator degree of aging quantitative test 4.3, composite insulator hydrophobic nature judgement 4.4, composite insulator be full of cracks degree analyzing 4.5.According to the analysis result of three aspects of composite insulator, carry out the degradation of composite insulator and analyze 4.6, whether the insulating property of synthetic determination composite insulator need to change.
The content of not doing in this instructions to describe in detail belongs to this area professional and technical personnel's known prior art.
Claims (3)
1. the high spectral method of detection of composite insulator is characterized in that, may further comprise the steps:
1) adopt hyperspectral imager that composite insulator is formed images; Obtain the Hyperspectral imaging of composite insulator, its process is: after the scanner of hyperspectral imager obtained the information of composite insulator, light was through behind the object lens; Pass slit, collimating mirror, dispersion element successively; The incident light of each wave band is carried out high-precision beam split, project the diverse location imaging on the detector, obtain the image of different-waveband; Detector changes the emittance of collecting into chemical energy or electric energy is stored, and by processor the signal of collecting is carried out signal amplification, encoding process then, exports Hyperspectral imaging at last;
2) Hyperspectral imaging to composite insulator carries out pre-service, comprises that geometry correction, radiant correction are to obtain comparatively accurate spectral information;
3) carry out Treatment Analysis with the specialty analysis platform, confirm the running status of composite insulator, result of determination output/demonstration judges whether to need to change composite insulator.
2. the high spectral method of detection of composite insulator according to claim 1 is characterized in that: step 2) in, the Hyperspectral imaging that obtains is whole transmission line of electricity, also should carry out the identification of composite insulator, from complicated background, extracts composite insulator.
3. the high spectral method of detection of composite insulator according to claim 1 is characterized in that: said specialty analysis platform comprises the degradation that identification, the quantitative test of composite insulator degree of aging, composite insulator hydrophobic nature are judged, composite insulator chaps degree analyzing, composite insulator of Hyperspectral imaging pre-service, composite insulator and analyzes six big modules.
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| CN103499551A (en) * | 2013-09-25 | 2014-01-08 | 武汉大学 | Method for identifying aging degree of bonding interface of binders |
| CN103941120A (en) * | 2014-03-31 | 2014-07-23 | 张奇 | Device for hydrophobicity detection and aging evaluation of composite insulator |
| CN104931810A (en) * | 2015-05-05 | 2015-09-23 | 云南电网有限责任公司电力科学研究院 | Composite insulator charging and UV aging monitoring device based on thermocycling system |
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| RU196867U1 (en) * | 2020-01-09 | 2020-03-18 | Акционерное общество "Научно-производственное объединение "Государственный институт прикладной оптики" (АО "НПО ГИПО") | DEVICE FOR DETECTION AND MEASUREMENT OF ELECTRIC DISCHARGE OF HIGH VOLTAGE EQUIPMENT |
| CN112924333A (en) * | 2021-01-27 | 2021-06-08 | 云南电网有限责任公司电力科学研究院 | Multi-purpose device for hydrophobicity detection and hyperspectral image shooting of composite insulator |
| CN114414051A (en) * | 2022-03-06 | 2022-04-29 | 浙江大学 | Staring type hyperspectral three-light conjugate acquisition and fusion imaging system |
| CN116203333A (en) * | 2023-01-10 | 2023-06-02 | 国网山东省电力公司超高压公司 | Comprehensive evaluation system and evaluation method for aging state of composite insulator material |
| CN116203333B (en) * | 2023-01-10 | 2024-03-22 | 国网山东省电力公司超高压公司 | Comprehensive evaluation system and evaluation method for aging state of composite insulator material |
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