40 results about "Insulator contamination" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

The present invention provides a method for spaying contamination on insulator surface, the method comprises following steps: according to a predetermined equivalent salt deposit density and non soluble deposit density, weighing a predetermined proportion of conductive substances, inert substances, adhesives and solvents to prepare contamination solutions; while maintaining temperature of the insulator surface to be sprayed lower than the temperature of the contamination solutions and setting temperature difference between the two as a first predetermined value, uniformly spraying the contamination solutions on the insulator surface to be sprayed to control error of an actual equivalent salt deposit density and the predetermined equivalent salt deposit density to a first predetermined range. The method controls the temperature difference between the insulator surface to be sprayed and the surface of the contamination solutions, so that the error between the equivalent salt deposit density and the test predetermined value is small, thereby ensuring accuracy of the equivalent salt deposit density of the insulator surface in the insulator contamination test.