190 results about "Pollution flashover" patented technology

The invention discloses an insulator pollution flashover monitoring device and method, and relates to the technical field of online monitoring and fault diagnosis of high-voltage power equipment. The monitoring unit comprises a fixing piece, a hanging piece arranged on the fixing piece, a swing arm rotationally arranged on the fixing piece and detection assemblies arranged on the swing arm at intervals in the length direction of the swing arm; the visual acquisition module is arranged on the unmanned aerial vehicle; the hanging piece is detachably connected with the unmanned aerial vehicle, the fixing piece is used for being detachably and fixedly connected with an insulator, the swing arm is in driving connection with a driving piece, the driving piece can drive the swing arm to swing around a first axis, and the first axis is perpendicular to a second axis of the insulator to be detected. The detection environment of the electric field probe is less affected by the surrounding insulator chain, so that the obtained monitoring data is more representative, and the monitoring result is more accurate.

The invention discloses an anti-pollution flashover coating with arc durability, which comprises the following components in parts by weight: 100 parts of hydroxyl-terminated polydimethylsiloxane, 10-25 parts of dimethyl silicone oil, 5-15 parts of a phosphorus flame retardant, 8-20 parts of white carbon black, 5-15 parts of modified mica powder, 15-30 parts of modified calcium carbonate, 10-20 parts of modified glass powder, 5-12 parts of aluminum hydroxide, 5-10 parts of 1, 3-butanediol, 5-10 parts of a flame retardant, 1-5 parts of an anti-aging agent, 1-5 parts of an anti-aging agent, and 1-5 parts of an anti-aging agent. The invention discloses a high-temperature-resistant coating which is prepared from the following components in parts by weight: 0.5-2 parts of 1, 2-bis (trimethoxysilyl) ethane, 5-10 parts of potassium titanate whiskers, 2-6 parts of color paste, 50-150 parts of a solvent, 3-10 parts of a cross-linking agent, 2-6 parts of a silane coupling agent and 1-5 parts of a catalyst. The invention also provides a preparation method of the anti-pollution flashover coating with arc durability. By introducing the modified mica powder, the modified glass powder and the modified calcium carbonate with specific particle sizes and reasonable gradation, the proportion of the filler in the base rubber is ensured, so that the modified mica powder, the modified glass powder and the modified calcium carbonate form a compact and firm ceramic high-temperature-resistant and arc-resistant layer after encountering high temperature of an arc; and the purpose of improving the arc durability is achieved.

The invention provides an embedded insulator coating structure and a preparation method and application thereof, and relates to the technical field of insulating materials. The invention provides an embedded insulator coating structure. The embedded insulator coating structure comprises an insulator, a plurality of grooves formed in the surface of the insulator, and room temperature vulcanized silicone rubber anti-pollution flashover coatings filled in the grooves and coated on the surface of the insulator, and the insulator is made of a hydrophilic material. According to the embedded insulator coating structure provided by the invention, the RTV coating (namely the room temperature vulcanized silicone rubber anti-pollution flashover coating) in the groove and the RTV coating on the surface are integrated, and meanwhile, the RTV coating in the groove is embedded into the insulator substrate, so that a mechanical interlocking structure is successfully formed, and the overall adhesive force and durability of the RTV coating are improved. According to the embedded insulator coating structure provided by the invention, the technical problem that a traditional coating type RTV coating structure of an insulator is insufficient in adhesive force and durability is solved.

The invention relates to a power transmission line fault risk grading evaluation method based on multistage early warning, and belongs to the field of power system safety. Comprising the following steps: acquiring an insulator surface pollutant data generation matrix; extracting spatial distribution characteristics of pollutants; leakage current waveforms under different humidity are calculated; extracting a leakage current harmonic component and pulse characteristics; dividing pollution flashover risk grades; matching the maintenance strategy and generating an equipment scheduling instruction; and performing fault risk grading evaluation to generate a report. According to the method, through multi-source data fusion and dynamic modeling, accurate evaluation and preventive maintenance of the pollution flashover risk of the insulator are realized, and the safety and reliability of a power system are improved.

The invention discloses a solvent-free dealcoholization type anti-pollution flashover coating containing a hyperbranched cross-linking agent and a preparation method of the solvent-free dealcoholization type anti-pollution flashover coating, and belongs to the technical field of coatings. The solvent-free dealcoholization type anti-pollution flashover coating is prepared from the following components in parts by mass: 80 to 100 parts of alkoxy silicone oil, 40 to 75 parts of filler, 3 to 7 parts of hyperbranched cross-linking agent, 0.2 to 0.5 part of catalyst, 1 to 3 parts of curing accelerator, 0.5 to 3 parts of coupling agent and 60 to 100 parts of structure control agent, wherein the hyperbranched cross-linking agent is prepared from vinyl trimethoxy silane and trimethoxy hydrogen silane through a cross-linking reaction under the action of an oxidizing agent and a platinum catalyst. The self-made hyperbranched cross-linking agent is added into the solvent-free dealcoholization type anti-pollution flashover coating, so that the mechanical property of the coating can be effectively improved, and the coating has excellent electrical property, meets the requirements of spraying construction and meets the comprehensive performance requirements of the anti-pollution flashover coating.

The invention relates to the technical field of high-voltage switch equipment, and discloses a primary and secondary fusion pole-mounted circuit breaker which comprises a base, a front plate is arranged on the front side of the base, the base and the front plate are connected through a connecting plate, a first solid-sealed polar pole is arranged on the top of the base, and a second solid-sealed polar pole is arranged on the top of the front plate. A high-voltage input plate is arranged at the top of the solid-sealed polar pole I, a high-voltage output plate is arranged on one side wall of the solid-sealed polar pole I, the connecting frame is fixedly connected between the solid-sealed polar poles I, the bird repelling mechanism is arranged at the top of the connecting frame and used for repelling birds to prevent the birds from stopping, and the shielding mechanism is arranged at the top of the solid-sealed polar pole I. By means of the bird repelling mechanism, the all-weather and intelligent active bird repelling function is achieved, stable equipment operation is guaranteed, a dual-drive mode combining wind power and solar power is adopted, it is guaranteed that the bird repelling function is uninterrupted, pollution flashover or short circuit faults caused by bird activities to high-voltage insulation parts are effectively avoided, and the equipment operation reliability is improved.

The embodiment of the invention discloses an insulator pollution flashover dynamic monitoring and early warning system, and relates to a power equipment state monitoring technology, and the system comprises a data collection module which is used for collecting the multi-source monitoring data of the operation state of an insulator, and the multi-source monitoring data comprises an electrical parameter, an environmental parameter and a pollution parameter; the feature processing module is used for performing time-frequency analysis and coupling analysis on the multi-source monitoring data to obtain data after feature processing; the mixed kernel function support vector machine analysis module comprises a kernel function calculation engine, a dynamic weight adjustment unit and a model optimizer, the kernel function calculation engine is used for supporting parallel calculation of a Gaussian kernel function and a polynomial kernel function, the dynamic weight adjustment unit is used for adaptive adjustment based on feature importance, and the model optimizer is used for parameter optimization; the early warning output module is used for outputting pollution flashover early warning information and maintenance decision suggestions according to the analysis result; the problems that a common monitoring system is poor in adaptability to complex environments and low in early warning accuracy can be solved.

The invention relates to a super-hydrophobic coating material for preventing pollution flashover on the surface of an insulator and a preparation method of the super-hydrophobic coating material. The coating material comprises hyperbranched polysiloxane, fluorinated graphene nanosheets, mesoporous silica, silane modified tungsten disulfide nanosheets, aluminum nitride nanoparticles, organic silicon resin, bisphenol A epoxy resin, deionized water, absolute ethyl alcohol and a pH regulator. The preparation method comprises the following steps: synthesizing tungsten disulfide nanosheets through a hydrothermal method, modifying the tungsten disulfide nanosheets with a silane coupling agent to improve the dispersibility, uniformly dispersing the tungsten disulfide nanosheets, fluorinated graphene nanosheets, mesoporous silica and aluminum nitride nanoparticles to form a nanofiller dispersion liquid, mixing the nanofiller dispersion liquid with hyperbranched polysiloxane, organic silicon resin and bisphenol A epoxy resin, and carrying out extrusion molding to obtain the composite material. A high-speed shearing dispersion and planetary stirring defoaming process is adopted; the coating material has excellent super-hydrophobicity, anti-pollution flashover capability and weather resistance, can effectively improve the protection performance of an insulator and prolong the service life, and is suitable for a long-term operation environment of power equipment.

The invention relates to the technical field of power system state monitoring, and discloses an insulator defect detection method and device and a storage medium, and the method comprises the steps: collecting the leakage current of an insulator, and constructing a polarity conduction screening model through power frequency phase information, so as to generate a composite current sequence which highlights the polarization attribute of an interface; analyzing the nonlinear degree of the attenuation rate of the sequence drifting along with evolution time in a multi-stage diffusion evolution time domain, and generating an interface electrochemical mass transfer composite index; utilizing the index to invert and construct an interface polarization background reference and stripping the interface polarization background reference from the composite current sequence so as to extract an abnormal discharge pulse residual error; and finally, quantizing the pulse form distortion degree of the residual error, and performing suppression normalization operation on the distortion degree by using the index to output a judgment result. According to the invention, the interference of the interface mass transfer process is effectively eliminated, and the specific detection of the pollution flashover hidden danger is realized.

The invention provides a lightweight high-insulation core composite material as well as a preparation method and application thereof, and relates to the technical field of lightweight high-insulation core composite materials. According to the invention, the foam core body with a uniform foam structure is subjected to fiber reinforcement, so that the foam core body has excellent electrical insulation performance, the pollution flashover phenomenon is reduced, the long-term stability of the material is ensured, the reliability of equipment is improved, and the service life of the equipment is prolonged. Through combination of the light core body and the fiber reinforcement layer, the composite material can effectively meet the requirements of high-voltage and ultra-high-voltage power transmission environments when being used as a post insulator, and the preparation method of the composite material provided by the invention has a simple process flow and high production efficiency, and is suitable for large-scale popularization and application.

The invention relates to the technical field of insulators, in particular to an anti-pollution flashover insulator and a preparation method thereof. The surface of the anti-pollution flashover insulator is coated with an anti-pollution flashover coating, and the anti-pollution flashover coating is prepared from the following raw materials in parts by weight: 50 to 60 parts of epoxy resin, 7 to 10 parts of 4, 4 '-sulfonyl diphenylamine, 5 to 8 parts of nano magnesium hydroxide, 2 to 4 parts of nano zinc oxide, 2 to 5 parts of 1, 3-cyclohexanedimethylamine, 3 to 5 parts of 1, 4-butanediol diglycidyl ether and 4 to 6 parts of functional additive. The prepared insulator has excellent anti-pollution flashover performance, the quality of the insulator is effectively guaranteed, the probability of large-area pollution flashover accidents during power transmission can be prevented to a certain extent, and safe operation of a power grid is guaranteed.

The invention relates to a silicone rubber composition, a silicone rubber composite material and a preparation method and application thereof, the silicone rubber composition comprises a component A (100 parts of base rubber, 10-20 parts of a diluent and 0.2-0.7 part of a platinum catalyst), a component B (100 parts of base rubber, 20-60 parts of a diluent, 1-10 parts of a cross-linking agent and 0.2-0.7 part of an inhibitor) and a component C (10-30 parts of a filler and 10-20 parts of a diluent), and the mass ratio of the component A to the component B to the component C is 10: 10: (0.8-1.3). The filling agent is prepared from aluminum hydroxide, graphene nanosheets, chopped glass fibers and kaolin, and the mass ratio of the aluminum hydroxide to the graphene nanosheets to the chopped glass fibers to the kaolin is (10-20): (0.2-1): (1.5-4): (0.5-5). The silicone rubber composite material provided by the invention is good in surface integrity, high in heat resistance and strong in arc resistance and flame retardance, and is suitable for manufacturing composite insulators and anti-pollution flashover coatings.

The embodiment of the invention discloses an insulator pollution flashover dynamic monitoring and early warning method, device and equipment and a storage medium, and relates to the technical field of power equipment state monitoring, and the method comprises the steps: collecting the multi-source monitoring data of the operation state of an insulator in real time, the multi-source monitoring data comprising an electrical parameter, an environmental parameter and a pollution parameter; performing feature fusion processing on the multi-source monitoring data to construct a feature matrix, and obtaining an environment-pollution dynamic coupling factor; a hybrid kernel function support vector machine model is constructed, the hybrid kernel function support vector machine model adopts a hybrid kernel function of a Gaussian kernel and a polynomial kernel, and the kernel function proportion is dynamically optimized through an adaptive weight adjustment mechanism; based on the feature matrix and the environment-pollution dynamic coupling factor, using the mixed kernel function support vector machine model to realize pollution flashover early warning; the problems that a traditional monitoring method is poor in adaptability to a complex environment and low in early warning accuracy can be solved.

An anti-pollution flashover composite anti-bird cover device for a cross arm suspension insulator belongs to high-voltage power transmission and transformation line equipment, and comprises an anti-bird cover main body which is assembled into an integral umbrella shape by a first half cover body and a second half cover body through a connecting part and is detachable, the first half cover body and the second half cover body are fixed together through a connecting bolt on the connecting plate, a central boss is arranged on the edge of the through hole, a positioning bolt hole is transversely formed in the central boss, and the surface of the first half cover body and the surface of the second half cover body are provided with a split-type connected wind power bird repelling device right opposite to the central boss. The umbrella-shaped design of the anti-bird cover can thoroughly block a bird droppings flashover channel, the wind power bird repeller and the anti-bird thorns are installed on the surface of the anti-bird cover body, birds are repelled to stop on the surface of the anti-bird cover body, the amount of droppings accumulated on the surface of the anti-bird cover body is reduced, and the long-term use stability of the anti-bird cover is improved.

The utility model relates to the technical field of high-voltage electric appliances for urban vehicles, in particular to a high-voltage equipment box for urban vehicles. Two pairs of side walls including the first side wall, the second side wall, the third side wall and the fourth side wall are included. The first end of the incoming cable terminal connected with the pantograph is connected with the pantograph on the roof, penetrates through the incoming side current transformer, the second end of the incoming cable terminal is connected with the input side of the vacuum circuit breaker, and the incoming cable terminal is input into the incoming side voltage transformer and is connected to the input side of the vacuum circuit breaker; the first end of the main transformer cable terminal is connected with the output side of the vacuum circuit breaker, and the second end of the main transformer cable terminal is connected to a main transformer structure, so that the insulating capacity is greatly improved, pollution flashover of high-voltage components on the roof caused by environmental factors such as wind, dust, rain, snow and haze when the main transformer cable terminal is externally arranged originally is avoided, quality accidents caused by environmental influence are effectively avoided, and the service life of the main transformer cable terminal is prolonged. And the maintenance is convenient, and the whole life cycle cost is reduced, so that the overhaul cost is reduced.

The utility model relates to a current transformer, and belongs to the field of current transformers. Comprising an explosion-proof expander, an oil tank, a hollow insulator, a base, a secondary lead tube and a secondary outlet box, the explosion-proof expanders and the hollow insulators are installed at the top end and the bottom end of the oil tank in a one-to-one correspondence mode, the hollow insulators are installed at the top end of the base, the secondary outlet box is installed on the base, and the secondary lead pipe penetrates through the hollow insulators and is connected with the secondary outlet box. The hollow insulator is composed of an epoxy glass fiber tube, a porcelain umbrella skirt sleeve and two insulator flanges, the porcelain umbrella skirt sleeve is sleeved on the epoxy glass fiber tube, the two insulator flanges are arranged at the top ends and the bottom ends of the epoxy glass fiber tube and the porcelain umbrella skirt sleeve in a sealing mode in a one-to-one correspondence mode, and the secondary lead tube is arranged in the epoxy glass fiber tube. According to the utility model, the impact resistance, explosion resistance, pollution flashover resistance, ultraviolet resistance, wind and sand resistance, acid rain resistance and aging resistance of the current transformer can be improved.

The embodiment of the invention discloses an insulator pollution flashover test method considering the property of a pollution source, and the method comprises the steps: carrying out the pollution treatment of a sample insulator according to the property of the pollution source, and obtaining a test insulator; arranging the test object insulator and a test environment thereof; applying low voltage and steam mist to the test object insulator to enable the test object insulator to reach a saturated wet state; according to the method, a pollution test is carried out on the test object insulator by adopting a gradually-decreasing constant voltage method to obtain the flashover voltage of the test object insulator, the test object insulator can be smeared in a targeted manner according to the pollution source property of a certain area, and then the flashover voltage is obtained through the test, so that the representativeness and typicality of the test are improved, and more accurate test data are obtained; and guidance is provided for insulation configuration and operation maintenance of the power transmission line in the region.

The invention discloses a novel mixed insulator for a coastal operation environment and a preparation method thereof, and relates to the field of insulators. The preparation method comprises the following steps: manufacturing a mold, controlling the thickness of the surface silicone rubber to be 1-8mm, and enabling the insulator to be a porcelain or glass insulator; carrying out surface treatment on the insulator by adopting a plasma jet technology; placing the insulator in the mold, injecting the high-temperature vulcanized silicone rubber banburying material into the mold, and curing and demolding to obtain the high-temperature vulcanized silicone rubber. A layer of high-temperature silicone rubber with a breakdown-resistant effect is vulcanized on the surface of the porcelain / glass insulator, hydrophobicity is improved, surface creepage density is reduced, electrochemical corrosion is reduced, the anti-pollution flashover performance of the composite insulator is combined, meanwhile, the excellent mechanical performance of the porcelain / glass insulator is reserved, and the operation requirements of insulators in coastal areas can be met.

The utility model discloses a novel line column type composite insulator, which comprises a fixed core body, a high-voltage end head is arranged at the top end of the fixed core body, an adhesive film is arranged at the joint of the high-voltage end head and a fixed umbrella cover, and the high-voltage end head and the fixed core body are fixedly adhered through the adhesive film. The bottom end of the fixed core body is sleeved with a metal accessory in a compression joint mode, a threaded connector is formed in the bottom end of the metal accessory, the metal accessory is in threaded connection with a screw assembly through the threaded connector, the outer side of the fixed core body is sleeved with a fixed umbrella cover, and part of the metal accessory is wrapped by the bottom end of the fixed umbrella cover. And the fixed umbrella cover integrally wraps the high-voltage end socket at the upper end. According to the utility model, the electrical performance of a product can be effectively improved, the creepage distance of the product is reasonably and effectively increased, the anti-pollution flashover capability of the insulator is greatly improved, the normal service life of the insulator can be effectively ensured, and the production efficiency of the product is improved.

The present invention provides an intelligent analysis system for porcelain insulators that combines mechanical and electrical properties, and relates to the field of monitoring data processing technology. The present invention can accurately track the path, speed, and direction of pollution flashover propagation from the starting porcelain disk to other porcelain disks by fusing multimodal images and time series analysis, thereby realizing dynamic modeling of the pollution flashover evolution process, effectively breaking through the limitations of the traditional static assessment model, and significantly improving the real-time and accuracy of risk assessment. The present invention marks the earliest pollution abnormal porcelain disk as the starting point of pollution flashover propagation through retrospective analysis of the integrated fusion abnormal points, and constructs a propagation chain and time series, which helps to identify key node porcelain disks and establish fault prediction logic based on evolutionary relationships. Through the dual-channel triggering mechanism, the early warning capability is significantly improved, ensuring that intervention can be made in the early stages of the risk, effectively preventing flashover from spreading to the entire string of insulators and causing system accidents.

The embodiment of the invention discloses an insulator pollution flashover voltage prediction method comprising the following steps: obtaining an insulator training data set which comprises insulator information of a pollution insulator and a corresponding flashover voltage; an LS-SVM model is constructed; the insulator information is input into the LS-SVM model, parameters of the LS-SVM model are optimized until the difference between the output of the LS-SVM model and the flashover voltage corresponding to the insulator information meets a threshold condition, and it is determined that training of the LS-SVM model is completed; and the trained LS-SVM model carries out pollution flashover voltage prediction on test data and obtains a prediction result. According to the method, the prediction model is constructed and optimized based on historical data, and accurate prediction of the pollution flashover voltage of the insulator is realized by using the model, so that support is provided for safe and stable operation of a power system.

The invention provides a method and device for preventing pollution flashover of a high-voltage insulator in a humid and hot environment, and the method comprises the steps: obtaining an insulator surface image, leakage current, environment temperature and humidity, and rainfall data in real time through a multi-dimensional monitoring module; carrying out feature fusion processing on the multi-source data, and judging the pollution grade and the pollutant type of the insulator based on a pre-trained lightweight convolutional neural network and gradient boosting tree fusion model; according to the pollution grade and the pollutant type, the pressure of an air pump, the rotating speed of a brush and a cleaning mode are dynamically adjusted through a self-adaptive active cleaning module, and combined type cleaning operation is executed; and after cleaning is completed, the insulator state data are collected again, and if the pollution grade is not reduced to the preset threshold value, a secondary cleaning instruction is generated and early warning information is reported. According to the invention, accurate monitoring and self-adaptive active cleaning of the dirty state of the high-voltage insulator in the humid and hot environment can be realized, the anti-pollution flashover reliability is obviously improved, the pollution flashover risk is reduced by more than 90%, and the operation and maintenance cost is reduced by 40-50%.

The invention discloses a power distribution station house intelligent inspection robot based on an AI large model and a control system thereof, and relates to the technical field of power distribution station house inspection. And a multi-modal large model based on power distribution station house industry data fine adjustment is integrated in the multi-modal data processing module, and the multi-modal data processing module is used for processing and analyzing multi-modal data acquired by the path-finding camera, the distance measuring radar and the inspection information acquisition assembly and outputting an inspection result and a control instruction. According to the invention, the multi-mode large model based on power distribution station house industry data fine adjustment is arranged in the main control assembly, so that intelligent diagnosis and comprehensive pre-judgment of the state of key equipment of the power distribution station house are realized. The robot can fuse and analyze multi-source data such as infrared thermal imaging, partial discharge ultrasonic waves, sulfur hexafluoride gas concentration and the like and identify specific hidden dangers of a power distribution station room such as overheating of a switch cabinet contact, abnormal oil level of a transformer bushing, pollution flashover risk of an insulator and the like, so that targeted early warning and maintenance suggestions are output; and traditional data acquisition is improved into intelligent diagnosis and comprehensive pre-judgment.

The application relates to the technical field of power equipment inspection, in particular to a power equipment inspection method and system based on visual identification; the method comprises the following steps: collecting visible light images, infrared images, ultraviolet images and environment working condition identifiers, and generating a multi-environment three-mode inspection data set; mapping the visible light images, the infrared images and the ultraviolet images to an insulator cross-mode surface coordinate grid to obtain a three-mode coordinate observation point set, and generating a mode environment applicability structure; constructing a three-mode time sequence fingerprint, analyzing the time sequence change relationship of the three-mode time sequence fingerprint based on the environment working condition identifiers, and identifying a high-humidity sensitive grid set; performing state integration processing on the three-mode time sequence fingerprint of the spatial position in the insulator cross-mode surface coordinate grid, generating pollution flashover hidden danger judgment information of a target insulator, and outputting a power equipment inspection result containing the pollution flashover hidden danger judgment information. The application realizes the positionable inspection judgment of insulator pollution flashover hidden dangers in a high-humidity pollution environment.

The application discloses a power distribution network communication fault type identification method and device, electronic equipment and storage medium, the method comprises the following steps: obtaining the voltage mode time-frequency matrix before and after the occurrence of the power distribution network communication fault, extracting the voltage fundamental wave amplitude, the voltage main harmonic amplitude and the voltage main harmonic amplitude frequency before and after the occurrence of the communication fault; obtaining the current mode time-frequency matrix before and after the occurrence of the power distribution network communication fault, extracting the current direct current amplitude, the current main harmonic amplitude, the current main harmonic amplitude frequency and the current total frequency band amplitude before and after the occurrence of the communication fault; based on the above parameters, a criterion is constructed to determine whether the power distribution network communication fault type is a lightning flashover communication fault or an insulator pollution flashover communication fault. Through the implementation of the application, the lightning flashover communication fault and the insulator pollution flashover communication fault in the power distribution network can be effectively identified, thereby significantly improving the operation reliability of the power distribution network and ensuring the safe and stable operation of the power system.

The present application discloses a method, device and electronic equipment for determining the number of insulators on a transmission line, and belongs to the field of electric power engineering technology. The method for determining the number of insulators on a transmission line includes the following steps: obtaining first basic data of a number of insulators on the transmission line, the first basic data including configuration information, pollution degree and altitude of the insulators; determining first correction data corresponding to the insulators based on the first basic data, the first correction data including: test salt density and upper and lower surface area pollution ratio correction coefficient; generating fitting data corresponding to the insulators based on the first basic data and the first correction data, the fitting data representing the single-piece pollution flashover voltage under different test salt density conditions; predicting the configuration result of the single-piece pollution flashover voltage based on the selected test salt density and the selected test salt density, the configuration result is used to configure the number of insulators under the selected test salt density, actual pollution degree and actual altitude conditions. The present application can improve the efficiency of configuring the number of insulators.

The invention belongs to the technical field of insulators, and discloses an anti-pollution flashover umbrella skirt structure optimized composite insulator which comprises an insulating core rod and a plurality of umbrella skirt units arranged on the insulating core rod in a sleeving mode, each umbrella skirt unit comprises a main umbrella skirt body and an auxiliary umbrella skirt body, and an annular pollution dredging and flow guiding inclined face is arranged on the upper umbrella face of each main umbrella skirt body. The radial inclination angle of the sewage draining and flow guiding slope is gradually increased in a gradient manner outwards along the radial direction of the umbrella body; the edge of the lower umbrella surface of the main umbrella skirt body is provided with an annular arc-resisting rib; the arc cutting fracture structures cut off the circumferential development path of an electric arc, the annular arc blocking ribs lengthen the creepage path of the electric arc, meanwhile, the arc cutting fractures of the upper and lower adjacent main umbrella skirt bodies are distributed in a staggered mode, axial through of the electric arc is eradicated, the arc extinguishing probability is remarkably improved, and the arc extinguishing effect is improved. And pollution flashover is thoroughly inhibited, and the device is suitable for severe working conditions such as counter-weight pollution and rainstorm.

The invention relates to the technical field of high-voltage insulation, and particularly discloses a high-voltage bushing with a self-cleaning hydrophobic surface and a preparation method thereof.The preparation method comprises the steps that the outer insulation surface of the high-voltage bushing is subjected to cleaning and activation pretreatment; a coating composition containing a low-surface-energy polymer adhesive and a functional filler subjected to hydrophobic treatment is uniformly applied to the surface of the pre-treated sleeve in a spraying manner and the like; and finally, a firmly combined functional coating is formed on the surface of the sleeve through curing treatment. The invention further provides the high-voltage bushing prepared through the method, the pollution flashover resistance of the bushing can be remarkably improved, the surface self-cleaning effect can be achieved by means of rain wash, the operation and maintenance workload is greatly reduced or eliminated, and the high-voltage bushing is particularly suitable for power equipment operating in the outdoor high-pollution and high-humidity severe environment.

The invention discloses a lightning protection structure for a wind generating set, and belongs to the technical field of wind generating sets, the lightning protection structure comprises a lightning rod, the lightning rod is fixed on a supporting seat, the supporting seat is located in a main rod body, wind power blades are installed on the main rod body, and the lightning protection structure further comprises a rainfall sensor installed on the side edge of the main rod body, and the rainfall sensor is electrically connected with the servo motor and the electric telescopic rod, the output end of the servo motor is connected with a transmission lead screw, the transmission lead screw is installed in the middle of the supporting seat in a penetrating mode, and the electric telescopic rod is fixedly installed on the side edge of the upper end of the main rod body. According to the lightning protection structure for the wind generating set, the telescopic lightning protection device can be adopted, the telescopic lightning protection device extends out for lightning protection only when needed in thunderstorm weather and is stored in sunny days, the exposure time of the lightning protection device is shortened, meanwhile, impurities attached to the surface of the lightning protection device can be cleaned when the lightning protection device stretches out and draws back, and the service life of the lightning protection device is prolonged. And the phenomenon of pollution flashover caused by attachment of dust and impurities is prevented.

The invention relates to a post porcelain insulator pollution flashover state monitoring method based on multi-modal information digital conversion and fusion, and the method comprises the steps: obtaining a visible light image and an infrared image of a post porcelain insulator, and carrying out the segmentation of the visible light image at the bottom layer of the visible light image and the infrared image through an improved YOLOv11-MLL model, obtaining an insulator area of the visible light image and an insulator area of the infrared image; the insulator pollution degree of the insulator area of the visible light image is obtained through extraction of a Gaussian process regression model; insulator temperature rise information of an insulator area of the infrared image is extracted through a character recognition technology; obtaining a discharge ultraviolet pulse waveform of the pillar porcelain insulator, and extracting to obtain insulator discharge information; calculating an IDFI index according to the insulator pollution degree, the insulator temperature rise information and the insulator discharge information; and judging the pollution flashover state of the pillar porcelain insulator according to the IDFI index and a preset threshold value. Compared with the prior art, the accuracy and reliability of pollution flashover state monitoring are improved.