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41 results about "Insulator contamination" patented technology
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Insulator contamination caused by the close proximity of the Persian Gulf and Oman Sea, coupled with industrial pollution, have a major impact on the reliability of the transmission system and distribution network.
Alternating current transmission line insulator contamination condition detection method based on infrared thermography
InactiveCN103411970AAccurately obtainedQuality improvementMaterial analysis by optical meansInsulator contaminationTower
The present invention discloses an alternating current transmission line insulator contamination condition detection method based on infrared thermography, wherein an infrared thermal imager is adopted to shoot an insulator thermal field image, an image treatment technology is adopted to extract an insulator image, relevant characteristic quantities are calculated, an environmental temperature and an environmental humidity are combined, and genetically-optimized neural network training is adopted so as to judge a contamination level of the insulator in the infrared image. The detection method has the following advantages that: an insulator contamination condition can be detected under a condition of no power failure, installation of any equipment on a pole tower is not required, operation cost and maintenance cost are low, operations are simple, use is safe and reliable, and detection accuracy is high.
Owner:TONGJI UNIV
A method for on-site sampling and pollution degree measurement of insulator pollution
InactiveCN102288515ALess heavy workAvoid contamination lossWeighing by removing componentWithdrawing sample devicesEngineeringInsulator contamination
The invention discloses a method for on-site sampling and pollution degree measurement of insulator pollution. The method adopts a sampling cloth to directly wipe the pollution on the surface of the insulator to be tested without taking off the insulator, and completes the collection of pollution on the surface of the insulator to be tested. According to GB / T16434 or Q / GDW152-2006 measure the salt density and ash density value of the dirt on the sampling cloth, that is to get the salt density and ash density value of the surface of the insulator to be tested. The method of the invention does not need to take off the insulator, and has the advantages of convenient on-site measurement, small sampling workload, accurate measurement data and the like.
Owner:WUHAN UNIV +1
Insulator contamination condition detection method based on multispectral image information fusion
InactiveCN106596579AImprove reliabilityImprove detection accuracyImage enhancementImage analysisPattern recognitionImage detection
The invention relates to an insulator contamination condition detection method based on multispectral image information fusion. The method comprises the following steps that the insulator contamination condition is detected through three spectral images of the visible image, the infrared image and the ultraviolet image simultaneously; the insulator contamination condition is comprehensively evaluated through information fusion according to the obtained spectral images. Compared with the prior art, the insulator contamination condition detection method has the advantages that the three image detection methods do not interfere with one another, the detection accuracy rate is high, non-contact is achieved, live detection is achieved, the detection speed is high, and the reliability of the detection result is high.
Owner:TONGJI UNIV
Insulator contamination on-line monitoring system
InactiveCN101929972AClean up in timeImprove monitoring accuracyTesting dielectric strengthCircuit arrangementsElectric power systemMonitoring system
The invention provides an insulator contamination on-line monitoring system, which comprises a monitoring terminal and a remote monitoring terminal, wherein the monitoring terminal records transmission line information; after meteorological information and insulator leakage current are collected and self-adaption amplification is carried out on the leakage current, the pulse frequency of the leakage current is obtained, the leakage current, the pulse frequency of the leakage current and the meteorological information are stored, and the information is submitted in a short message mode or according to an submitted instruction; when the value of the leakage current is greater than a preset alarm value of the leakage current, alarm information is sent; and system parameters of the monitoring terminal and the preset alarm value of the leakage current are modified according to an modification instruction. The remote monitoring terminal stores and displays the transmission line information, the leakage current, the pulse frequency of the leakage current and the meteorological information and carries out fusion processing on fundamental wave of the leakage current, the pulse frequency of the leakage current and the meteorological information, and the contamination degree on the surface of the insulator is obtained and displayed. The insulator contamination on-line monitoring system has the characteristics of high accuracy, strong real-time performance, fast response and the like and is widely applicable to a power system.
Owner:吕强
Online monitoring system for state of insulator contamination
The invention discloses an online monitoring system for the state of an insulator contamination. The monitoring system comprises a plurality of online monitoring devices for the state of the insulator contamination, an insulator monitoring base station, a W master station computer, a plurality of Internet user terminals and a plurality of mobile user terminals, wherein the online monitoring devices are mounted on an electric power pylon. Through the online state monitoring devices for the insulator contamination, the system monitors the density of contamination salt on the surface of an insulator and the leaked electric current of the insulator in a real-time manner to obtain the state of contamination on the surface of the insulator and give out a warning message for assisting an operation department in effectively cleaning the insulator, so that safety accidents caused by the contamination on the surface of the insulator are avoided.
Owner:STATE GRID CORP OF CHINA +2
Insulator on-line monitoring system
InactiveCN105116273ATesting dielectric strengthBiological neural network modelsData centerEngineering
The invention discloses an insulator on-line monitoring system, belonging to the high voltage protection electric appliance technology field. The insulator on-line monitoring system comprises a data collection module, a control module, a communication module and a remote data center; the data collection module is connected to the control module for collecting leakage current, environment humidity, and humidity data of the insulator; the control module is connected to the communication module; the communication module is in wireless connection with the remote data center; the control module performs preliminary current leakage determination and then transmits the data to the remote data center through the communication module; the remote data center performs data processing on received insulator related data by utilizing a wavelet fuzzy neural network model to obtain an insulator contamination degree analysis result. The insulator on-line monitoring system is high in prediction accuracy and high in efficiency and feasibility, and realizes the insulator on-line monitoring and promptly alarms for the insulator faults. Besides, the insulator on-line monitoring system solves the problem that the noise in the insulator leakage current signal is big, which affects the data analysis and monitoring result.
Owner:WUHU KAIXIN ARRESTER
Post insulator contamination degree recognition method
ActiveCN104459489AReduce workloadImprove accuracyTesting dielectric strengthElectric power systemEngineering
The invention discloses a post insulator contamination degree recognition method. The post insulator contamination degree recognition method comprises the following steps of 1 periodically monitoring and storing a leakage current amplitude of a post insulator and temperature, humidity and rainfall of an environment; 2 selecting multiple leakage current amplitude data and multiple environment humidity data in an effective time period, substituting the data into a model formula (shown in the description) and obtaining a first characteristic coefficient a and a second characteristic coefficient b through model formula fitting, wherein Im represents the leakage current amplitude, RH represents environment humidity, the first characteristic coefficient a is greater than 0, and the second characteristic coefficient b is greater than 0; 3 substituting the second characteristic coefficient b into a pre-equivalent salt deposit density prediction model and a contamination degree prediction model to obtain the equivalent salt deposit density and the contamination degree of the surface of the insulator corresponding to the second characteristic coefficient b. By means of the post insulator contamination degree recognition method, accuracy is high, a monitoring device is simple, real-time online monitoring can be achieved, reduction of power system working amount is facilitated, and contamination flashover risk is reduced.
Owner:SHENZHEN POWER SUPPLY BUREAU +1
Portable device and method for researching insulator contamination losing coefficient
ActiveCN103645112AFacilitate research workEasy to transportWeighing by removing componentSprayerEngineering
The invention relates to the field of electric power security, and in particular relates to a portable device and a method for researching the insulator contamination losing coefficient. The device comprises a raining sprayer and a water supply structure used for spraying water to the insulator, wherein the water supply structure comprises a water outlet pipe, a union and a water inlet pipe, the water outlet pipe and the water inlet pipe are connected by the union; the water inlet pipe further comprises at least one detachable water pipe; the detachable water pipes are connected by the union; a plurality of water outlets are arranged in two sides of the water outlet pipe, respectively; the water outlets are detachably connected with the raining sprayer; and valves are arranged on the water outlets; by using the detachable water supply structure to perform an insulator contamination losing coefficient experiment, the transportation and researches on a circuit field and a natural contamination are facilitated; furthermore, because the height of the water structure is adjustable, the raining function can be adjusted furthest, and the research works about the insulator contamination losing coefficient are facilitated.
Owner:ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
Insulator contamination online monitoring device and insulator decontamination device
InactiveCN106129889ASolve the monitoring of pollution levelImprove securityOptically investigating flaws/contaminationApparatus for overhead lines/cablesBrushless motorsMaterial resources
The invention provides an insulator contamination online monitoring device and insulator decontamination device. The insulator contamination online monitoring device and insulator decontamination device is characterized by comprising an insulator contamination online monitoring device and an insulator decontamination device, wherein the insulator contamination online monitoring device comprises an STM32F407 processor, an OV7670 color camera, an infrared thermal imaging sensor, a humidity sensor, a second-order active filter, an AC leakage sensor, a power management module and a Wi-Fi module; and the insulator decontamination device comprises a fixed station, a first brushless motor, a second brushless motor, a third brushless motor, a servo motor, a first mechanical arm, a second mechanical arm, a third mechanical arm, a semicircular mechanical grip, a booster pump and an anti-corrosion plastic pipe. The problem of monitoring of the insulator contamination degree is solved; and monitoring is more accurate by an image and an infrared analysis technology. Meanwhile, the invention further provides an efficient decontamination method. A lot of manpower and material resources are reduced; and the power supply safety and efficiency are improved.
Owner:徐洪军
Insulator pollution prediction method and device
ActiveCN104809511AImproved Pollution PredictionForecastingProbabilistic networksState dependentInsulator contamination
A method and a device for predicting insulator pollution grade includes acquiring prediction data affecting the insulator pollution grade; acquiring current pollution status of the insulator; predicting the insulator pollution grade based on the prediction data, the current pollution status and an insulator pollution grade calculating model, wherein the insulator pollution grade calculating model at least comprises an initial pollution status variable of the insulator, and a pollutant accumulation prediction and a pollutant reduction prediction based on the initial pollution status variable, at least one of the accumulation prediction and the reduction prediction being associated with the prediction data, and the initial pollution status variable being associated with the current pollution status.
Owner:IBM CORP
Insulator contamination removing device based on rain water collection
The invention discloses an insulator contamination removing device based on rain water collection. The insulator contamination removing device based on rain water collection comprises an insulator body, a purification mechanism arranged at the upper part of the insulator body and used for rain water collection, and a circulation mechanism arranged at the lower part of the insulator body, wherein a cyclone cluster for spraying the insulator body for drying is arranged at the lower part of the purification mechanism; a contamination removing mechanism for removing contamination on the insulator body is arranged at the circumference side of the insulator body. Based on a base of rain water collection, clean water can be obtained by a settling pond arranged on the upper part, the insulator body is cleaned by a nozzle through a high-pressure water pump, water after cleaning flows into a water collection pond, when a certain amount of water is stored in the water collection pond, settling purification is performed, the excessive water is pumped into the settling pond to be recycled, on a base of combining the cyclone cluster, the content of dust on the insulator body is greatly reduced, and flashover is avoided, so that the device is worthy of application and popularization.
Owner:NANYANG POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER
Method for measuring operating insulator contamination degree
InactiveCN105067473AReduce contamination residueHigh measurement accuracyMaterial impedanceWeighing by absorbing componentAlcoholFiltration
The invention discloses a method for measuring operating insulator contamination degree. The method includes: using alcohol containing absorbent cotton to scrub the foulant on the upper surface and lower surface of an insulator; determining the amount of distilled water or deionized water for washing the absorbent cotton, performing water equipartition to wash the absorbent cotton so as to reduce absorbent cotton foulant residue, and placing the foul solution in a foul solution memory; fully stirring the foul solution, and controlling the stirring time at 10min-30min; drying and weighing the filter paper used in filtration; filtering the foul solution with a filter unit, taking the filtered clear solution, and measuring the electric conductivity of the filtered clear solution to obtain the equivalent salt deposit density of the insulator; drying the filter paper, and weighing the dried filter paper, thus obtaining the insulator non-soluble deposit density. The method is simple, and employs the alcohol containing absorbent cotton to sample the insulator surface foulant. The absorbent cotton is washed repeatedly by water to reduce the absorbent cotton foulant residue, thus ensuring measurement precision. A vacuum pump is utilized to increase the foul solution filtration rate, thereby greatly reducing the foulant filtration time.
Owner:ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
Insulator contamination degree non-contact detection method and device
InactiveCN109799245AContamination levels are fast and preciseEasy to detectOptically investigating flaws/contaminationFull waveFeature learning
The invention discloses an insulator contamination degree non-contact detection method and device. Area-of-interest hyperspectral spectral line full-wave band data of insulators with different contamination degrees can be subjected to unsupervised feature learning to obtain adjacent-level connecting weights and feature representation; an insulator contamination degree prediction model based on a level extreme learning machine is built according to the connecting weights, feature representation and the spectral line data of the insulators with different contamination degrees; the insulator contamination degree prediction model is optimized; the contamination degrees of all local areas of the insulators are judged by the optimized insulator contamination degree prediction model, and finally,large-scale, rapid and accurate non-contact detection of the insulators with unknown contamination degrees is realized. A hyperspectral technique can be effectively assisted by introducing a level extreme learning machine algorithm to judge the contamination degrees of the insulators, the detection process is simple and efficient, cleaning operation of the insulators is more targeted, pertinent and objective, and a scientific basis is provided for non-contact insulator contamination degree judgment.
Owner:YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
Insulator contamination degree monitoring system
InactiveCN105182118AImprove detection accuracyImprove waveformElectrical testingMicrocontrollerMorphological filter
The invention discloses an insulator contamination degree monitoring system and belongs to the technical field of high-voltage protection electric appliances. The system comprises an insulator data collection unit, a signal pre-processing unit, a single-chip microcomputer, a communication unit, a solar power supply unit and a background center. The insulator data collection unit is used for acquiring the related data signals of an insulator, wherein the related data signals are composed of a leakage current signal, an ambient temperature signal and a humidity signal. The insulator data collection unit is connected with the signal pre-processing unit. The signal pre-processing unit is connected with the single-chip microcomputer. The single-chip microcomputer conducts the filtering treatment on noises by means of a composed morphological filter to obtain an analysis result on the contamination degree of the insulator. The single-chip microcomputer is connected with the communication unit. The communication unit is wirelessly connected with the background center. According to the technical scheme of the invention, the signal waveform of the leakage current can be obviously improved, so that the judgment on the contamination degree of the insulator is facilitated. The detection accuracy of the system is improved. The system is powered on by the solar energy, so that the long-term stable operation of the system is ensured. The problems that the noise processing precision is low and the error is large for the signals of the leakage current in the prior art can be solved.
Owner:WUHU KAIXIN ARRESTER
Insulator contamination special cleaner
ActiveCN102279122AReduce drop inEasy constructionPreparing sample for investigationCleaning using liquidsCleansers skinEngineering
The invention relates to a special cleanser for the dirt of an insulator. The special cleanser provided by the invention is characterized by comprising a bracket, an insulator adjusting bolt, a pulley, a collection disk and a crank, wherein the collection disk is arranged at the bottom of the bracket; the insulator adjusting bolt is fixed in an opening at the top of the bracket; the pulley is installed on the insulator adjusting bolt; and the crank is connected with the pulley. The device provided by the invention does not need to be fixed by being supported with hands, decreases the falling enhancement of metal dirt and reduces the enhancement of a half of existing additional pollutants. Personnel can be adjusted to optimization in the place needing to be cleaned, and the cleanser provided by the invention realizes labor saving and time saving, reduces low cleaning efficiency caused by overlong operating time, ensures that operating personnel are easy to grasp construction and realizes simple and clean operation sampling. Compared with a traditional cleaning tool, the cleanser provided by the invention greatly reduces the chance of existing dirt and pollution operating personnel,simultaneously reduces the labor intensity of the operating personnel and ensures the quality of sampling.
Owner:STATE GRID CORP OF CHINA
Revising method of power grid polluted area distribution map and power grid polluted area distribution map
ActiveCN105866150AAdapt to diversityTesting dielectric strengthMaterial analysis using radiation diffractionPower gridInsulator contamination
The invention provides a revising method of a power grid polluted area distribution map. Based on ratio analysis of Al2O3 and SiO2 in insulator contamination of a soil sample, influences that soil difference causes diversified components of the insulator contamination are added, and the revising of the power grid polluted area distribution map is finished through field sampling analysis and artificial contamination testing, so that the power grid polluted area distribution map can relatively accurately describe contamination distribution properties of one area and can be adaptive to the diversity of the types of soil in the area and the contamination components, and the requirements on external insulation design and adjustment of power transmission and transformation facilities can be met.
Owner:ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
Device and method for examining and repairing insulator contamination through combining image analysis with ultrasonic principle
InactiveCN105973908AImprove work efficiencyReduce labor intensityAnalysing solids using sonic/ultrasonic/infrasonic wavesOptically investigating flaws/contaminationUltrasonic sensorEngineering
The invention discloses a device and method for examining and repairing insulator contamination through combining image analysis with ultrasonic principle. The device includes a trolley with the bottom provided with universal idler wheels and a supporting rod arranged on the trolley and rotatingly connected with the trolley; the trolley is provided with a horizontal driving mechanism for driving the supporting rod to rotate; the supporting rod is provided with an angle adjustment rod in rotary connection; the supporting rod is provided with a vertical driving mechanism for driving the angle adjusting rod to rotate; a free end of the angle adjusting rod is provided with a laser lamp, an ultrasonic sensor and a high-magnification and high-precision telescope camera. Firstly, an insulator is subjected to surface image acquisition and fault acoustic acquisition respectively; then corresponding importing, comparison analysis and fault diagnosis are carried out by an insulator contamination fault analysis system; and finally, the analysis results of the two aspects are synthesized, the reports of insulator contamination status and fault are obtained, and an insulator string with contamination is subjected to electrified cleaning examining and repairing.
Owner:HENAN HONGBO MEASUREMENT & CONTROL
Haze-environment-simulating experimental device for insulator contamination accumulation characteristics and operation method thereof
The invention relates to a haze-environment-simulating experimental device for insulator contamination accumulation characteristics and an operation method thereof.The experimental device mainly comprises an axial flow fan, an experiment cabin, a haze-generation simulation system and a haze measuring system.The haze-generation simulation system comprises a particulate-matter adding device and a humidifying device, and the particulate-matter adding device and the humidifying device are both arranged in an inlet air channel of the experiment cabin; a parameter measuring system comprises a haze parameter monitoring device and a temperature and humidity transmission; the experiment cabin is divided into the inlet air channel, an inlet expansion section, an experiment-cabin low-speed section, an outlet contraction section and an air discharging section in the wind direction, and an insulator rotating device, a spraying rainfall device and a heating and drying device are arranged at the top of the experiment-cabin low-speed section.By means of the experimental device, research in the insulator contamination accumulation condition in the manual simulation haze environment is achieved; compared with the traditional research method of the natural contamination accumulation characteristics, the experimental period is short, controllability is high, and safety and reliability are achieved.
Owner:SOUTHEAST UNIV
On-line remote detection method and device for detecting state of disc-type insulator
InactiveCN105353236AOnline remote detection cannot be realizedLow running costElectrical testingMonitoring siteEngineering
The invention discloses an on-line remote detection method and device for detecting the state of a disc-type insulator, and the method comprises the steps: firstly obtaining contaminated conductance of a low-level end insulator of a monitoring insulator string through calculation; obtaining a representation value of insulator contamination through calculation, so as to represent the contamination degree of an insulator; building the relation between a proportion value Kn of an insulator voltage at a low-level end of the insulator string to an insulator string voltage and the contaminated conductance in a lab, and determining the number of zero-value insulators in the insulator string. According to the invention, the detection index of the zero-value insulators in the insulator string is very simple, and the number of the zero-value insulators is directly pointed out. When the number of insulators in the insulator string is large, several zero-value insulators are allowed to exist at the same time, thereby clearly pointing out the number of insulators. Moreover, the maintenance can be arranged according to the order of priority.
Owner:钱克猷 +1
A method for evaluating safe area of pollution degree of transmission line insulators
ActiveCN104090218BAccurate assessmentVisual assessmentTesting dielectric strengthStatistical analysisEngineering
Owner:STATE GRID CORP OF CHINA +1
Measurement method for local surface resistance of contaminated insulator
ActiveCN106918744AOvercome the disadvantage of large dispersionReflect the real pollution situationResistance/reactance/impedenceElectrical resistance and conductanceCopper wire
The present invention discloses a measurement method for local surface resistance of a contaminated insulator, belonging to the insulator contamination detection technology field. The measurement method comprises: the step 1: fixing a measured contaminated insulator on a sample frame, and employing a plurality of aluminum tapes with the same size to perform local segmentation of the measured contaminated insulator; the step 2: employing copper wires to connect all the aluminum tapes with a resistance measuring meter, applying voltage to the whole measured contaminated insulator, and employing the resistance measuring meter to measure and obtain resistance values of different wires; and the step 3: employing an area resistance value superposition method to calculate and obtain the surface resistance of the corresponding area of the measured contaminated insulator. The measurement method for local surface resistance of the contaminated insulator can reliably reflect the real pollution condition of the insulator surface and is simple to operate.
Owner:BEIJING GUODIAN FUTONG SCI & TECH DEV
Contamination condition evaluation method based on insulator image feature dictionary
ActiveCN108596196AImprove recognition accuracySolve the inaccurate identificationCharacter and pattern recognitionState of artPattern recognition
The invention relates to a contamination condition evaluation method based on an insulator image feature dictionary, which comprises three parts of insulator image feature dictionary construction, region segmentation and classifier training. The feature dictionary is constructed by utilizing sample insulator images; for a shot insulator under a complex background, by comparing to the feature dictionary, an identified insulator region is extracted; and by classifier training, discrimination on different contamination degrees of insulators is implemented. Compared to the prior art, the method disclosed by the invention has the advantages that identification accuracy is high, and the method is convenient for a worker to operate, is beneficial for reducing an insulator contamination flashoverpower failure and can be used for insulator contamination condition detection places and the like under the complex background of transformer substation and power transmission and distribution line polling and the like.
Owner:TONGJI UNIV
Insulator contamination monitoring system
InactiveCN106597240AAvoid flashoverPredictiveTesting dielectric strengthUltravioletMonitoring system
The invention discloses an insulator contamination monitoring system. An ultraviolet detection module, a temperature detection module and a humidity detection module are arranged to detect a contamination ultraviolet discharge signal of an insulator and the temperature and humidity of the environment where the insulator is placed respectively and input the ultraviolet discharge signal and temperature and humidity signals to a BP neural network prediction module. The BP neural network prediction module gives a predicted value of equivalent salt deposit density. The predicted value of equivalent salt deposit density is sent out through a wireless sending module under the control of a controller module. In a monitor room, a wireless receiving module receives the equivalent salt deposit density data. The staff checks and monitors the equivalent salt deposit density data at a PC monitoring side. Insulator flashover is prevented by predicting the equivalent salt deposit density. The insulator contamination monitoring system is predictive and practical.
Owner:GUILIN NORMAL COLLEGE
A Sampling and Measuring Method of Pollution Degree of Insulators
ActiveCN101393152BSolve incomplete problemsEasy to carryWeighing by removing componentPreparing sample for investigationInsulator contaminationWater bottle
The invention discloses a method for sampling and measuring the pollution degree of insulators. The method proposes a cleaning and sampling method for washing with a pressure water spray can, and adds the item of measuring ash density during the measurement process, which solves the problem of incomplete pollution degree measurement items , so that the test results are more in line with the real situation, and the invention also discloses a specially designed set of sampling funnel device, which is light and easy to carry to the site for sampling.
Owner:STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
Manual sampling device for insulator contaminants and sampling method of manual sampling device
InactiveCN107505151AWipe thoroughlySampling is thorough and completeWithdrawing sample devicesInsulator contaminationComputer science
The invention discloses a manual sampling device for insulator contaminants and a sampling method of the manual sampling device. The manual sampling device comprises sampling cloth, a sampling bar and a fixing element, wherein the sampling bar comprises a ball-shaped end and a handle, the ball-shaped end of the sampling bar is wrapped with the sampling cloth, and the tail part of the sampling cloth is tightly locked on the sampling bar through the fixing element. According to the manual sampling device for the insulator contaminants and the sampling method of the manual sampling device, the contaminants on the surface of an insulator can be sampled thoroughly and completely, so that accuracy of insulator contaminant sampling and accuracy of insulator contamination degree measurement are improved.
Owner:ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
Prediction Method of Pollution Degree of Insulators Based on BP Neural Network and Fuzzy Logic
ActiveCN104616060BSimple structureAccurate description of pollution degreeBiological neural network modelsForecastingInsulator contaminationContamination
The invention discloses a method for predicating contamination severity of insulator based on BP neural network and fuzzy logic, and belongs to the field of safety analysis and evaluation of power grids. The predication of the contamination severity of the insulator is essentially a state evaluation process of an uncertain and nonlinear system. The method is characterized in that the temperature, humidity, rainfall, wind speed and other basic factors are used as the basic input quantity to construct a BP neutral network predication model for the contamination severity of the insulator; the influence of attitude related to complex geographic position, air pressure ratio, freezing water conductivity and other factors on the contamination severity of the insulator is fully considered; the fuzzy logic compensation method is carried out to correct the evaluation result; the fuzzy mathematical method is carried out to comprehensively predicate the contamination severity of the insulator, and thus the problem of typical uncertainty of unclear factors influencing the contamination severity of the insulator during the evolution process can be solved; the method provides important scientific basis for determining the operation state of the power grid.
Owner:NANJING INST OF TECH
Insulator defect detection method based on machine learning
ActiveCN114187295BImprove the recognition rateLow training sample requirementImage enhancementImage analysisAlgorithmEngineering
The invention discloses an insulator defect detection method based on machine learning, comprising: converting an insulator picture into a plurality of signal values, taking the axial direction of the insulator as the row direction of the picture, and taking the direction perpendicular to the row direction as the column direction, and the picture The row direction of the image is the time direction of the signal, and the gray value of the column direction of the picture is the signal strength value; the identification model is set; the signal value is input into the identification model, and the identification model outputs the identification result. The insulator defect detection method based on machine learning disclosed by the present invention has a high recognition rate, especially for insulator damage, flashover, crack and insulator pollution, and the recognition effect is better.
Owner:CHINA CREC RAILWAY ELECTRIFICATION BUREAU GRP +1
A transmission line insulator contamination sensing device
InactiveCN103604811BAvoid disadvantagesOptically investigating flaws/contaminationInsulator contaminationHigh pressure
The invention relates to insulator monitoring in the field of high-voltage transmission and distribution and provides a pollution sensing device for an insulator. The insulator is in the shape of an umbrella skirt. The pollution sensing device comprises an analog insulator which has the same shape as that of the insulator, a power supply, a quartz sensor, a wireless network and a terminal computer, wherein the power supply is used for supplying current to the quartz sensor, the quartz sensor and the terminal computer are in signal connection through the wireless network, the quartz sensor comprises at least one quartz rod, the quartz rod extends to pass through the middle point of the umbrella skirt from one point of the peripheral line of the umbrella skirt of the analog insulator and extends to another point of the peripheral line of the umbrella skirt of the analog insulator, and the projection of the quartz rod to the bottom face of the analog insulator is a straight line.
Owner:张季红
High-voltage anti-pollution flashover anti-vacuum flashover insulator and preparation method thereof
InactiveCN110047631AImproved Surface InertnessReduce air permeabilityInsulatorsPolymer scienceSurface breakdown
The invention belongs to the technical field of power equipment, in particular to a high-voltage anti-pollution flashover anti-vacuum flashover insulator and a preparation method thereof. The insulator comprises a fluorinated polymer matrix, oxide particles uniformly dispersed in the fluorinated polymer matrix and a photocatalyst film uniformly covering the surface of the fluorinated polymer matrix, wherein holes are uniformly dispersed in the surface of the fluorinated polymer matrix, the holes are formed by removing oxide particles on the surface of the fluorinated polymer matrix through corrosion by adopting an inorganic acid chemical corrosion method, the material of the oxide particles is an oxide which is easily dissolved in an inorganic acid, and the photocatalyst film is a TiO2-SiO2 composite photocatalyst film. The holes which are evenly distributed are manufactured in the surface of the fluorinated polymer insulator, the surface breakdown voltage of the insulator is improved,the vacuum flashover phenomenon is reduced, the photocatalyst film covers the fluorinated polymer insulator, the purposes of reducing the pollution degree and pollution speed of the insulator and prolonging the service life of the insulator are achieved, and the anti-pollution flashover performance of the insulator is improved.
Owner:HEFEI DAHU ELECTRIC WIRE & CABLE TECH CO LTD
A portable insulator pollution loss coefficient research device and method
ActiveCN103645112BFacilitate research workEasy to transportWeighing by removing componentEngineeringInsulator contamination
The present invention relates to the field of electric power safety, in particular to a device and method for researching the pollution loss coefficient of portable insulators. The water pipe, the outlet pipe and the water inlet pipe are connected by a joint, and the water inlet pipe includes more than one section of detachable water pipes, and the detachable water pipes are connected by a joint, and several A water outlet, the water outlet is detachably connected with the rainfall nozzle, and the water outlet is provided with a valve. The present invention uses a detachable water supply structure to carry out the insulator pollution loss coefficient experiment, which is convenient for transportation and on-site and natural Research on pollution accumulation points, and the height of the water supply structure can be adjusted, which can adjust the kinetic energy of rainfall to the greatest extent, and facilitate the research work on the pollution loss coefficient of insulators.
Owner:ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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