CN103529057A - Device and method for detecting pollution of insulator by image analysis combined with ultrasonic principle - Google Patents
Device and method for detecting pollution of insulator by image analysis combined with ultrasonic principle Download PDFInfo
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Abstract
The invention discloses a device for detecting pollution of insulator by image analysis combined with an ultrasonic principle. The device comprises a collecting unit, a host machine and a computer provided with an insulator pollution fault analysis system, wherein the collecting unit is connected with the host machine through a signal transmission line and comprises an ultrasonic wave signal sensor, a high power high precision telescope camera, a temperature sensor and a humidity sensor. The host machine comprises an AD (Analogue to Digital) converter, an amplifier, a filter and a controller. The method for detecting pollution of insulator by image analysis combined with the ultrasonic principle and the corresponding instrument and device can judge the grade in real time for the insulator pollution degree, pre-warm pollution flashover immediately and carry out normalized management on insulator quality and condition of the power transmission line, thereby effectively inhibiting safe operation accidents caused by fault of the insulator. Therefore, realization and popularization of the invention generate huge direct and indirect economic and social benefits to safe and stable operation of a power grid.
Description
Technical field
The present invention relates to the filthy checkout equipment technical field of Technologies For The Insulators In Power System, particularly a kind of graphical analysis detects the device and method of insulator contamination in conjunction with ultrasonic principle.
Background technology
The anti-pollution flashover of electrical network is an ancient and real problem.Along with China's rapid economic development, electricity needs increases day by day on the one hand, and power system transmission line electric pressure improves constantly, and electrical network scale constantly expands, AC and DC networking is on the increase, and the pollution source of each department are on the increase on the other hand. atmospheric pollution aggravation.Being exposed to insulator surface under filthy condition, can to deposit filthy atmospheric pollution increasingly outstanding; All cause the pollution flashover coverage that is difficult to avoid to increase, the risk of large area pollution flashover is still being born in the safe operation of China's electrical network.
According to statistics, the pollution flashover accident in greasy weather accounts for 21% of power circuit accident.Pollution flashover accident often causes large-area power failure, and maintenance is long release time, and therefore impact is serious.According to casualty data statistical study, the electric quantity loss that pollution flashover accident causes is 9.3 times of damage to crops caused by thunder accident.
Henan Electric Power System has successively experienced three dense fogs at the beginning of calendar year 2001, and the impact that dense fog brings to electrical network is large time by time.Pollution flashover is from January 16 to January 26 for the first time, and one day 110kV and the Above Transmission Lines number of times that trips is at most 11 times; The large area pollution flashover in pollution flashover north, Henan on the 12nd from February 9 to February for the second time, one day 110kV and Above Transmission Lines tripping operation number of times are 18 times; For the third time pollution flashover from February 21 to February 25 Yu Bei, the western serious Great flashover in Henan, February 21 is to two days on the 22nd 110kV and Above Transmission Lines tripping operation number of times 108 times.Repeating large area pollution flashover fault amounts to 178 times, involve 11 (comprising Yun Jian company) in the 18Ge service area of Henan, successively cause 500kV transformer station that 1 station time decompression occurs, there is 2 stations time decompression in 220kV transformer station, there is 2 stations time decompression in 110kV transformer station, the wide electric railway in capital is the catastrophic failure such as interrupt run in short-term.Wherein also occurred a lot of because zero resistance insulator bursts, the accident that wire lands.
Although respectively transmit electricity, administrative authority all can take various anti-pollution measures for the prevention of pollution flashover, but not very good, one of its major reason is that electric power maintenance personnel can not grasp insulator contamination situation timely and accurately, therefore, the reliable detection of insulator contamination degree is a very important ring in anti-pollution flashover work.Convenient reliable pollution level detects can guarantee that dirty Division is accurate, thereby provides scientific basis for power transmission and transformation equipment outer insulation designs with Insulator Selection, is the basic guarantee that prevents large area pollution flashover accident.
For certain filthy parameter or its derivative parameter, in conjunction with relevant service condition, many scholars and engineering technical personnel detect and have done a large amount of fruitful work and developed a small amount of on-line measuring device insulator contamination, at present, domestic and international on-the-spot use and method that laboratory study may detect for insulator contamination mainly divide artificial pollution to detect and filth detection two large classes naturally, have: equivalent salt density method, surface electrical inducing defecation by enema and suppository, pollution flashover gradient method, maximum leakage current method, current impulse counting method, leakage current method, spectroscopic methodology, microwave irradiation, UV pulse method, acoustic-emission, environmental monitoring method, the several different methods such as infrared imaging method.
The measurement of equivalent salt density should be carried out on the insulator of actual motion.The dirt that can record insulator surface distributes.But this method has only been measured the equivalence amount of dirt active constituent, and do not consider the impacts such as moistening, electric arc evolution.Meanwhile, while measuring filthy equivalent salt amount, the number of Water usage, affects the accuracy of measured value, sometimes can differ several times, but this parameter is difficult to realize real-time automatic monitoring, and salt is close is an average concept, poor in timeliness.Because of the difference of dirt composition, the result of measurement can cause very large difference again.
The advantage of insulator arc-over gradient method is the true insulator of test, and measures their pollution flashover performance.But the method expense is larger, very high to the requirement of power-supply device and surveying instrument.Simultaneously, in-site measurement is not easy to capture opportunity, because naturally filthy contamination level reaches critical conditions, can not occur with the meteorological condition that causes pollution flashover simultaneously, filthy degree has reached critical level often, but does not have to occur moist fully condition and measure less than critical pollution flashover voltage.The on-the-spot utilization of this method is subject to the restriction of equipment and condition, generally uses difficult.
Above-mentioned several method exists respectively cannot be with electro-detection, and optical component is unstable, cannot determine that analytic expression expresses because character of surface is complicated, affected by environmental variance excessive, involves great expense and is unfavorable for the deficiencies such as spread use.
To sum up analyze, to the detection of the filthy fault of insulator dielectric how to realize fast, accurately judgement, and to make checkout equipment easy to operate, practical be current problem demanding prompt solution.
Summary of the invention
In order to address the aforementioned drawbacks, the invention provides a kind of image analytical method and can realize charged, to detect at a distance insulator contamination device and method in conjunction with ultrasonic principle, first to insulator carry out surface image, knocking noise wavelength-division does not gather, by insulator contamination trouble analysis system, carrying out corresponding importing, compare of analysis and fault again judges, the analysis result of last comprehensive two aspects, draws insulator contamination state and Trouble Report.
For realizing the technical scheme that object of the present invention adopts, be: a kind of graphical analysis detects the device of insulator contamination in conjunction with ultrasonic principle, comprise collecting unit, main frame, the computer of insulator contamination trouble analysis system is installed, described collecting unit is connected with main frame by signal transmssion line, described collecting unit comprises ultrasonic signal sensor, high power high precision telescope video camera, temperature sensor and humidity sensor, and described main frame comprises AD converter, amplifier, wave filter and controller.
Described controller comprises human-computer interaction module, LED display module and voice module.
Described signal transmssion line adopts 4 core shielded cables.
On described controller, be connected with and intercept earphone.
Use said apparatus to detect the method for insulator contamination, comprised following steps:
1. data acquisition: be divided into ultrasonic signal collection and filthy image acquisition two parts, a. the boresight of ultrasonic signal sensor is aimed to tested insulator chain, and put on earphone, ultrasonic signal sensor by the ultrasonic signal collecting through amplification with after filtering, by main frame, carry out accurate amplification and filtration for the second time again, controller is calculated the intensity of ultrasound wave waveform and sound signal in conjunction with default distance, electric pressure and current Hygrothermograph, be modeled as the acoustical signal of response by intercepting earphone, be modeled as corresponding histogram and export by LCD; While transmitting fault sound in intercepting earphone, stop trouble spot is carried out detecting around 360 degree, to determine the accurate location that sends abnormal signal trouble location, and the ultrasonic signal now detecting is deposited in USB storage by the storage key on main frame, thereby complete the collection of trouble spot ultrasonic signal; B. after finishing trouble spot ultrasonic signal collection, with high power high precision telescope video camera, faulty insulator is carried out to image taking, and the coded message of the tower of typing simultaneously bar;
2. information analysis: the USB storage of having stored ultrasonic signal data and image file data is inserted and is provided with in the computer USB interface of insulator contamination trouble analysis system, by data message corresponding to insulator contamination trouble analysis system, import in " circuit-Ta bar " file of having built up, insulator contamination trouble analysis system has a judgement accurately to the filthy situation of insulator, and generates examining report.
Graphical analysis is to form by surface state graphical analysis and the online effective combination that detects two kinds of modes of ultrasound wave in conjunction with Ultrasonic Detection insulator contamination method, so it has following advantage:
(1) this detection method can realize charged, online detection at a distance, can realize on-the-spot judgement and diagnostic software analysis.Therefore just greatly improve the work efficiency of electric inspection process, and reduced staff's labour intensity.
(2) method of this invention adopts the combination of graphical analysis, two kinds of analytical approachs of ultrasound wave on-line monitoring, has guaranteed the comprehensive grasp to insulator contamination situation, and can realize accurate early warning, reduces the security risk that insulator contamination causes.
(3) realized from insulator contamination state-detection, record and having upgraded, fault in-situ judgement, early warning, to the Whole Course Management that decision references is provided, perfect Management of Electrical Enterprise content.
(4) for the relation of summing up between insulator electric property decline rule, insulator arc-over and its microclimate, microenvironment variation provides theoretical foundation, for circuit operation maintenance department progressively realizes the transformation from " prophylactic repair " to " repair based on condition of component ", provide valuable on-the-spot run book.
Graphical analysis is in conjunction with Ultrasonic Detection insulator contamination method and corresponding apparatus, can realize insulator contamination degree is carried out to real-time grade judgement, the pollution flashover situation occurring is carried out to timely early warning, and can carry out normalization management to the insulator quality of transmission line of electricity and situation, thereby effectively contain the safe operation accident causing because of insulator breakdown.Therefore, realization of the present invention and popularization, will produce huge directly and indirectly economic and social benefit to power network safety operation.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, invention is further described:
Fig. 1 is module diagram of the present invention;
Fig. 2 is ultrasonic data acquisition circuit diagram of the present invention;
Fig. 3 is ultrasound data treatment circuit schematic diagram of the present invention.
Embodiment
As shown in Figure 1, 2, 3, a kind of graphical analysis detects the device of insulator contamination in conjunction with ultrasonic principle, comprise acquisition module, main frame, the computer of insulator contamination trouble analysis system is installed, described acquisition module is connected with main frame by signal transmssion line, described acquisition module comprises ultrasonic signal sensor, high power high precision telescope video camera, temperature sensor and humidity sensor, and described main frame comprises amplifier, wave filter, AD converter, controller.Described controller comprises human-computer interaction module, LED display module and voice module.Described signal transmssion line adopts 4 core shielded cables.On described controller, be connected with and intercept earphone.Described insulator contamination trouble analysis system on 02 20th, 2010 oneself carry out software copyright registration, National Copyright Administration of the People's Republic of China's registration number is 2010SR053549.Fig. 2: connector J1 mouth receives after acoustic signals, through amplifier chip, U1 amplifies, and is coupled, then after amplifier chip U2 amplifies processing bis-times, from connector J2 output, sends into next stage and process by capacitor C 2.Fig. 3: gather connector J2 mouth signal shown in upper level Fig. 2 and send into connector J1 mouth, after amplifying by high input impedance operational amplifier U9, variohm W2 carries out amplitude adjusted, through the mono-amplifier of amplifier chip U10, carry out secondary amplification again, signal after amplification is minute two-way output after capacitor C 18, capacitor C 19 are carried out interference filter, central processing unit is sent in one tunnel after AD chip US-inAD conversion, histogram form shows embodiment, and the mode connector J2 output of amplifier chip U11 audio frequency after low noise high speed amplifier is sent on an other road.Ultrasonic signal sensor is built-in with amplification and filters original paper.
Use said apparatus to detect the method for insulator contamination, comprised following steps:
1. data acquisition: be divided into ultrasonic signal collection and filthy image acquisition two parts, a. the boresight of ultrasonic signal sensor is aimed to tested insulator chain, and put on earphone, ultrasonic signal sensor by the ultrasonic signal collecting through amplification with after filtering, by main frame, carry out accurate amplification and filtration for the second time again, controller is calculated the intensity of ultrasound wave waveform and sound signal in conjunction with default distance, electric pressure and current Hygrothermograph, be modeled as the acoustical signal of response by intercepting earphone, be modeled as corresponding histogram and export by LCD; When sound signal reaches setting value, intercept while transmitting fault sound in earphone, stop trouble spot is carried out detecting around 360 degree, to determine the accurate location that sends abnormal signal trouble location, and the ultrasonic signal now detecting is deposited in USB storage by the storage key on main frame, thereby complete the collection of trouble spot ultrasonic signal; B. after finishing trouble spot ultrasonic signal collection, with high power high precision telescope video camera, faulty insulator is carried out to image taking, and the coded message of the tower of typing simultaneously bar;
2. information analysis: the USB storage of having stored ultrasonic signal data and image file data is inserted and is provided with in the computer USB interface of insulator contamination trouble analysis system, open software, select " importing data ", corresponding data message is imported in " circuit-Ta bar " file of having built up; Insulator breakdown diagnostic system combining environmental factor, the intrinsic situation of insulator, distance factor, by graphical analysis, comparison of wave shape, audio frequency contrast means, determine insulator contamination situation, comprehensive objective analysis and subjective judgement, the filthy situation of insulator is had to a judgement accurately, and generate examining report.
Graphical analysis is to form by surface state graphical analysis and the online effective combination that detects two kinds of modes of ultrasound wave in conjunction with Ultrasonic Detection insulator contamination method, so it has following advantage:
(1) this detection method can realize charged, online detection at a distance, can realize on-the-spot judgement and diagnostic software analysis.Therefore just greatly improve the work efficiency of electric inspection process, and reduced staff's labour intensity.
(2) method of this invention adopts the combination of graphical analysis, two kinds of analytical approachs of ultrasound wave on-line monitoring, has guaranteed the comprehensive grasp to insulator contamination situation, and can realize accurate early warning, reduces the security risk that insulator contamination causes.
(3) realized from insulator contamination state-detection, record and having upgraded, fault in-situ judgement, early warning, to the Whole Course Management that decision references is provided, perfect Management of Electrical Enterprise content.
(4) for the relation of summing up between insulator electric property decline rule, insulator arc-over and its microclimate, microenvironment variation provides theoretical foundation, for circuit operation maintenance department progressively realizes the transformation from " prophylactic repair " to " repair based on condition of component ", provide valuable on-the-spot run book.
Graphical analysis is in conjunction with Ultrasonic Detection insulator contamination method and corresponding apparatus, can realize insulator contamination degree is carried out to real-time grade judgement, the pollution flashover situation occurring is carried out to timely early warning, and can carry out normalization management to the insulator quality of transmission line of electricity and situation, thereby effectively contain the safe operation accident causing because of insulator breakdown.Therefore, realization of the present invention and popularization, will produce huge directly and indirectly economic and social benefit to power network safety operation.
Claims (5)
1. a graphical analysis detects the device of insulator contamination in conjunction with ultrasonic principle, it is characterized in that: comprise collecting unit, main frame, the computer of insulator contamination trouble analysis system is installed, described collecting unit is connected with main frame by signal transmssion line, described collecting unit comprises ultrasonic signal sensor, high power high precision telescope video camera, temperature sensor and humidity sensor, and described main frame comprises AD converter, amplifier, wave filter and controller.
2. graphical analysis as claimed in claim 1 detects the device of insulator contamination in conjunction with ultrasonic principle, it is characterized in that: described controller comprises human-computer interaction module, LED display module and voice module.
3. graphical analysis as claimed in claim 1 detects the device of insulator contamination in conjunction with ultrasonic principle, it is characterized in that: described signal transmssion line adopts 4 core shielded cables.
4. graphical analysis as claimed in claim 1 detects the device of insulator contamination in conjunction with ultrasonic principle, it is characterized in that: on described controller, be connected with and intercept earphone.
5. use said apparatus to detect the method for insulator contamination, it is characterized in that: comprised following steps:
1. data acquisition: be divided into ultrasonic signal collection and filthy image acquisition two parts, a. the boresight of ultrasonic signal sensor is aimed to tested insulator chain, and put on earphone, ultrasonic signal sensor by the ultrasonic signal collecting through amplification with after filtering, by main frame, carry out accurate amplification and filtration for the second time again, controller is calculated the intensity of ultrasound wave waveform and sound signal in conjunction with default distance, electric pressure and current Hygrothermograph, be modeled as the acoustical signal of response by intercepting earphone, be modeled as corresponding histogram and export by LCD; While transmitting fault sound in intercepting earphone, stop trouble spot is carried out detecting around 360 degree, to determine the accurate location that sends abnormal signal trouble location, and the ultrasonic signal now detecting is deposited in USB storage by the storage key on main frame, thereby complete the collection of trouble spot ultrasonic signal; B. after finishing trouble spot ultrasonic signal collection, with high power high precision telescope video camera, faulty insulator is carried out to image taking, and the coded message of the tower of typing simultaneously bar;
2. information analysis: the USB storage of having stored ultrasonic signal data and image file data is inserted and is provided with in the computer USB interface of insulator contamination trouble analysis system, by insulator contamination trouble analysis system, corresponding data message is imported in " circuit-Ta bar " file of having built up, insulator contamination trouble analysis system has a judgement accurately to the filthy situation of insulator, and generates examining report.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215551A (en) * | 2014-09-24 | 2014-12-17 | 南方电网科学研究院有限责任公司 | Method for testing natural pollution characteristics of high-voltage external-insulation device |
| CN104316851A (en) * | 2014-10-30 | 2015-01-28 | 国网上海市电力公司 | Method and device for automatically monitoring pollution of line insulators |
| CN104316804A (en) * | 2014-11-10 | 2015-01-28 | 国家电网公司 | Ultrasonic positioning detection alarm used for transformer substation |
| CN104931586A (en) * | 2015-05-25 | 2015-09-23 | 国家电网公司 | Detection system of intelligent insulator detecting robot |
| CN105606712A (en) * | 2015-11-10 | 2016-05-25 | 国网浙江慈溪市供电公司 | Ultrasonic detection probe, detection method, and detection system |
| CN105846354A (en) * | 2016-05-31 | 2016-08-10 | 国网河南省电力公司南阳供电公司 | Overhaul equipment for preventing device mistakenly entering charged interval in power engineering operation |
| CN105911439A (en) * | 2016-04-15 | 2016-08-31 | 国网河南省电力公司济源供电公司 | Integrated diagnosis and analysis system for external insulation unit |
| CN107424078A (en) * | 2016-12-14 | 2017-12-01 | 云南电网有限责任公司电力科学研究院 | Fiery point data based on satellite remote sensing causes the computational methods of transmission line of electricity flashover |
| CN109581100A (en) * | 2018-11-16 | 2019-04-05 | 国网浙江海盐县供电有限公司 | Portable high-pressure equipment fault positioning device and its localization method |
| CN109799442A (en) * | 2019-03-29 | 2019-05-24 | 云南电网有限责任公司电力科学研究院 | Insulator contamination prediction technique and system based on airborne hyperspectral |
| CN110791942A (en) * | 2019-11-13 | 2020-02-14 | 东华大学 | Method for evaluating contamination degree of light-colored clothes in image analysis system |
| CN111880043A (en) * | 2020-06-29 | 2020-11-03 | 武汉钢铁有限公司 | Method, device and system for positioning fault hidden danger points of power transmission line |
| CN117517335A (en) * | 2023-12-27 | 2024-02-06 | 国网辽宁省电力有限公司电力科学研究院 | System and method for monitoring pollution of insulator of power transformation equipment |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215551A (en) * | 2014-09-24 | 2014-12-17 | 南方电网科学研究院有限责任公司 | Method for testing natural pollution characteristics of high-voltage external-insulation device |
| CN104316851A (en) * | 2014-10-30 | 2015-01-28 | 国网上海市电力公司 | Method and device for automatically monitoring pollution of line insulators |
| CN104316804A (en) * | 2014-11-10 | 2015-01-28 | 国家电网公司 | Ultrasonic positioning detection alarm used for transformer substation |
| CN104931586A (en) * | 2015-05-25 | 2015-09-23 | 国家电网公司 | Detection system of intelligent insulator detecting robot |
| CN105606712A (en) * | 2015-11-10 | 2016-05-25 | 国网浙江慈溪市供电公司 | Ultrasonic detection probe, detection method, and detection system |
| CN105911439A (en) * | 2016-04-15 | 2016-08-31 | 国网河南省电力公司济源供电公司 | Integrated diagnosis and analysis system for external insulation unit |
| CN105846354A (en) * | 2016-05-31 | 2016-08-10 | 国网河南省电力公司南阳供电公司 | Overhaul equipment for preventing device mistakenly entering charged interval in power engineering operation |
| CN107424078A (en) * | 2016-12-14 | 2017-12-01 | 云南电网有限责任公司电力科学研究院 | Fiery point data based on satellite remote sensing causes the computational methods of transmission line of electricity flashover |
| CN109581100A (en) * | 2018-11-16 | 2019-04-05 | 国网浙江海盐县供电有限公司 | Portable high-pressure equipment fault positioning device and its localization method |
| CN109799442A (en) * | 2019-03-29 | 2019-05-24 | 云南电网有限责任公司电力科学研究院 | Insulator contamination prediction technique and system based on airborne hyperspectral |
| CN109799442B (en) * | 2019-03-29 | 2021-11-19 | 云南电网有限责任公司电力科学研究院 | Insulator pollution flashover prediction method and system based on airborne hyperspectrum |
| CN110791942A (en) * | 2019-11-13 | 2020-02-14 | 东华大学 | Method for evaluating contamination degree of light-colored clothes in image analysis system |
| CN110791942B (en) * | 2019-11-13 | 2021-06-25 | 东华大学 | Method for evaluating contamination degree of light-colored clothes in image analysis system |
| CN111880043A (en) * | 2020-06-29 | 2020-11-03 | 武汉钢铁有限公司 | Method, device and system for positioning fault hidden danger points of power transmission line |
| CN117517335A (en) * | 2023-12-27 | 2024-02-06 | 国网辽宁省电力有限公司电力科学研究院 | System and method for monitoring pollution of insulator of power transformation equipment |
| CN117517335B (en) * | 2023-12-27 | 2024-03-29 | 国网辽宁省电力有限公司电力科学研究院 | System and method for monitoring pollution of insulator of power transformation equipment |
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Application publication date: 20140122 |