62 results about "Pollution flashover" patented technology

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 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 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 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 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 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 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.

The utility model discloses an auxiliary umbrella cover which is used for covering an insulator in operation, the insulator comprises an insulator, a sheath and a spiral umbrella skirt, the sheath and the spiral umbrella skirt are arranged outside the insulator, and the spiral umbrella skirt is in a continuous spiral shape on the periphery of the sheath along the axial direction of the insulator. The spiral umbrella skirt comprises a plurality of single-circle spiral umbrella skirts which are sequentially connected in the axial direction of the insulator, the auxiliary umbrella cover is a spiral single-piece umbrella cover, the auxiliary umbrella cover is adhered to the upper surface of the spiral umbrella skirt through an adhesive, and the auxiliary umbrella cover at least continuously covers the upper surface of one single-circle spiral umbrella skirt. The auxiliary umbrella cover is tightly bonded on the spiral umbrella skirt, so that the problem of aging of the insulator is effectively solved, the maintenance cost of the insulator is reduced, the auxiliary umbrella cover is long in service life and not easy to pollute and damage, and the ice flashover resistance, rain flashover resistance and pollution flashover resistance of the insulator are improved.

The application discloses an elastic anti-pollution flashover anti-icing anti-corrosion coating material and a preparation method thereof. The coating material comprises, in parts by weight, 80-120 parts of a silicone modified polycarbonate polyurethane resin, 2-10 parts of a modifier, 15-30 parts of a pigment and filler, 0.5-1 part of a defoaming agent, 0.5-1 part of a leveling agent and 0.5-1 part of a dispersing agent. The modifier is a nitrogen-doped porous carbon loaded with phosphate or a nitrogen-doped porous carbon modified by zinc nitride loaded with phosphate. The nitrogen-doped porous carbon and the nitrogen-doped porous carbon modified by zinc nitride in a layered structure are added to the coating system as a barrier modifier, and the carbon material loaded with phosphate is added to the coating. Under long-term use of the coating, the phosphate released by the carbon material loaded with phosphate can be stably hydrolyzed, so that loose iron oxides are converted into a corrosion-resistant phosphide film, and the corrosion is inhibited.

The application relates to a preparation method of a rare earth-carbide composite phase-containing anti-pollution flashover tempered glass substrate, and relates to the technical field of tempered glass preparation. Rare earth oxides, carbide powder and grinding aids are mixed to obtain a rare earth-carbide composite powder; base raw materials, the rare earth-carbide composite powder, fluxing agents and clarifying agents are mixed to obtain mixed raw materials; the mixed raw materials are sent into a glass melting furnace for melting, argon is introduced for stirring, and clarification is carried out; the clarified glass liquid is injected into a mold for pressing and forming, and after demolding, the glass is sent into a tempering furnace to obtain a tempered glass intermediate to obtain the rare earth-carbide composite phase-containing anti-pollution flashover tempered glass substrate; the application can effectively improve the internal stress distribution of the glass, reduce defects, and improve the bending strength and pollution flashover voltage of the tempered glass.

The application belongs to the technical field of power equipment insulation, and is especially a composite insulator for power overhead line, which comprises a core rod, the core rod is rigidly arranged, and the two ends of the core rod are fixedly connected with a first fitting and a second fitting respectively, the first fitting is used for being connected with a tower, and the second fitting is used for hanging a conductor, a full-peripheral sealing patch is fixedly attached to the outer surface of the core rod along the length direction; and an umbrella skirt body, the umbrella skirt body is a one-piece molding structure of silicon rubber, and the inner side wall of the umbrella skirt body is adapted to the outer surface of the full-peripheral sealing patch. The application has the advantages of reliable sealing performance, high mechanical strength, good pollution flashover resistance, convenient installation and maintenance, and can effectively prevent water, dust and corrosive medium from invading, improve the stability and service life of the insulator in complex environment, and meet the high performance requirements of the power overhead line on the insulating components.

The application discloses a substation insulator pollution flashover monitoring method and device, electronic equipment and storage medium. Among them, the method comprises the following steps: collecting the pollution flashover sound wave data of the target monitoring insulator, filtering the pollution flashover sound wave data, and obtaining the target sound wave data; determining the target environment data of the environment where the target monitoring insulator is located, wherein the target environment data comprises at least one of equivalent salt density data, temperature and humidity data and air dust content data; the target sound wave data and the target environment data are input into the pollution flashover evaluation model for pollution flashover evaluation, and the target pollution flashover grade is obtained; the target pollution flashover grade is used as the pollution flashover monitoring result corresponding to the target monitoring insulator. The application monitors the pollution flashover of the insulator from multiple dimensions (sound wave and environment), and improves the accuracy of the substation insulator pollution flashover monitoring.

The application discloses an insulator super-hydrophobic anti-pollution flashover coating and a preparation method thereof, and belongs to the technical field of anti-pollution flashover coatings. The preparation method comprises the following steps: spraying a bottom coating on the surface of a cleaned insulator, wherein the bottom coating comprises 30-45 parts of polydimethylsiloxane, 15-20 parts of micron modified aluminum hydroxide, 3-5 parts of micron modified titanium dioxide, 5-10 parts of nanometer modified silicon dioxide, 45-55 parts of a dispersing agent and 1-2 parts of a curing agent; after the bottom coating is cured, a surface coating is sprayed, and the coating is obtained after curing; the surface coating comprises 6-10 parts of polydimethylsiloxane, 7-15 parts of micron modified silicon dioxide, 3-5 parts of micron modified titanium dioxide, 0.5-5 parts of nanometer modified silicon dioxide, 75-85 parts of a dispersing agent and 0.6-0.9 parts of a curing agent. The super-hydrophobic anti-pollution flashover coating has good hydrophobic self-cleaning performance, anti-pollution flashover capacity, high durability, good anti-impact capacity and self-repairing capacity.

The utility model discloses a composite insulator capable of improving pollution flashover, which belongs to the technical field of insulators and comprises a steel foot, a porcelain piece arranged on the steel foot, a steel cap arranged on the porcelain piece, a plurality of annular grooves arranged on the porcelain piece along the length direction, and antifouling rubber belts arranged in the annular grooves. Compared with single-layer silicon rubber coating, the ceramic piece-antifouling rubber belt-ceramic piece-antifouling rubber belt alternate composite structure can more effectively maintain hydrophobicity, even if local silicon rubber is aged, partial unaged rubber can still maintain the overall hydrophobic characteristic, pollution flashover is prevented, and the service life of the ceramic piece-antifouling rubber belt-ceramic piece-antifouling rubber belt is prolonged. The problem of hydrophobicity attenuation caused by aging of the whole rubber in the all-composite insulator is avoided, dirt adhesion is reduced, the anti-pollution flashover capability is enhanced, and the service life is prolonged.

The embodiment of the invention relates to a structural data determination method and device for an umbrella skirt damage insulator, equipment and a medium. The method comprises the steps that umbrella skirt damage data of a current insulator and insulation attribute data of a complete insulator corresponding to the current insulator are acquired; determining a first relation function, a second relation function and a third relation function corresponding to the umbrella skirt damage data; wherein the first relation function represents the relation between the pollution flashover voltage and the creepage distance, the second relation function represents the relation between the grading ring field intensity and the grading ring pipe diameter, and the third relation function represents the relation between the umbrella skirt field intensity and the cover depth; and determining improved structure data corresponding to the current insulator according to the insulation attribute data, the first relation function, the second relation function and the third relation function. Therefore, the insulation characteristic of the insulator still meets the required insulation effect after the umbrella skirt is damaged.

The invention discloses a preparation method of a full-dimensional cement-based super-infiltration insulator material. The preparation method comprises the following steps: obtaining Portland cement slurry; sequentially adding a silane coupling agent and an ultra-infiltration modifier into the Portland cement slurry to obtain first mixed slurry; compounding calcium carbonate particles, diatomite and hydrophobic silicon dioxide particles with different particle sizes in the first mixed slurry, uniformly stirring, and then adding an active mineral admixture to obtain second mixed slurry; and carrying out compression molding and curing treatment on the second mixed slurry, and demolding and curing to obtain the full-dimensional cement-based super-infiltration insulator material. The full-dimensional insulator does not depend on a surface functional coating, a low-temperature compression molding process is adopted, a super-hydrophobic block material with a compact interior and a multi-stage rough surface structure is formed, the material body has super-infiltration, high mechanical strength and high electrical insulation performance, and then the problem of pollution flashover prevention of electrical equipment is fundamentally solved.

The invention relates to the technical field of insulators, in particular to an insulator with an anti-breakdown protection piece, which comprises a mounting column, the side surface of the mounting column is fixedly sleeved with an umbrella sleeve, an overvoltage protection module is fixedly arranged at the central position of the mounting column, and two ends of the overvoltage protection module are fixedly connected with contact terminals. Supply assemblies are arranged on the two sides of the mounting column, a cleaning assembly is arranged on the side face of the umbrella sleeve, and an auxiliary assembly is arranged on the upper side of the mounting column. When the overvoltage protection module emits heat due to discharge, release and circulation of inert gas can be automatically triggered, the gas not only provides an arc extinguishing medium for a protection part in the closed cavity, but also is discharged through a specific channel, on one hand, the surface of the umbrella skirt of the insulator is continuously cleaned, pollution flashover is prevented, on the other hand, heat is taken away, and the service life of the insulator is prolonged. And when the system encounters extreme overvoltage, the system can instantly increase the air flow and guide the air flow to the high-voltage terminal for key protection.

The utility model belongs to the technical field of electrical element protection, and particularly relates to a remote online monitoring system for leakage current of a high-voltage discharge insulator, which is characterized in that a leakage current acquisition ring is fixedly arranged on the insulator, and a plurality of detection bolts in one-to-one correspondence with conductive coatings are arranged on the leakage current acquisition ring; the plurality of detection bolts are connected with a leakage current acquisition device, the leakage current acquisition device transmits detected leakage current data to a Web server in a wireless transmission mode, the Web server is in wireless / wired communication with an online monitoring computer, the Web server is further in wireless communication with a 4G wireless router, and the 4G wireless router is connected with the Web server. And the 4G wireless router is in wireless communication with the high-voltage pulse discharge power supply. According to the utility model, the leakage current on the surface of the insulator can be monitored online in real time, and the pollution degree on the surface of the insulator can be judged timely, so that pollution flashover accidents of the insulator of the power transmission line can be prevented timely, economic loss is reduced, and safe operation and informatization management level of the power transmission line are improved.

This invention discloses a lightweight rod-shaped insulator with fatigue resistance and flashover resistance, and its preparation method, in the field of insulator manufacturing technology. The lightweight rod-shaped insulator includes a composite core rod, a sheath skirt covering the outer periphery of the composite core rod, and fittings pressed to both ends of the composite core rod. The composite core rod is composed of an epoxy resin-based composite material inner core and an outer reinforcing layer woven from basalt fiber-glass fiber strands. The sheath skirt is designed with a modified silicone rubber material formula containing C16-C22 alkyl-grafted polydimethylsiloxane, ternary modified reinforcing filler, and compounded anti-aging agent. This invention has excellent mechanical strength, flashover resistance, overvoltage resistance, and resistance to extreme environments, with significant lightweight effect. It can meet the speed-up requirements of electrified high-speed rail operation at speeds of 450 km / h and above, effectively ensure the safe and stable operation of the contact network, reduce operation and maintenance costs, and has good industrialization and promotion value.

The invention discloses an isolating switch, and relates to the technical field of high-voltage isolating switches, the isolating switch comprises a mounting base, the upper surface of the mounting base is fixedly connected with two insulating columns, the top ends of the two insulating columns are fixedly provided with a switch blade plate and a contact plate respectively, and one end of the switch blade plate is rotatably connected with the top ends of the insulating columns through a rotating shaft; a cleaning mechanism is arranged on the surface of the mounting base, the cleaning mechanism comprises a first limiting ring and a second limiting ring which are rotationally arranged on the surface of the insulating column, a [-shaped movable frame is fixedly connected between the first limiting ring and the second limiting ring, and a plurality of extension rods are fixedly connected to the surface of the side, close to the insulating column, of the [-shaped movable frame. The cleaning mechanism is arranged on the surface of the mounting base, the cleaning brush of the cleaning mechanism can rotate around the insulating column, and the air nozzle of the air injection column is matched for air injection and dust removal, so that dust and impurities on the surface of the insulating column can be efficiently removed, pollution flashover accidents are avoided, and the insulating performance and operation stability of equipment are improved.

The invention provides a power transmission line fault reason identification method, system and device and a medium, and relates to the field of power systems, and the method comprises the steps: obtaining fault data and a to-be-identified fault, and processing the fault data and the to-be-identified fault to obtain discrete cause information; constructing posterior probability distribution of various fault causes under a given cause condition based on historical discrete cause information; fusing the posterior probability distribution into a preset Bayesian model to obtain a fault identification model; and different impedance angle information is acquired, and the fault identification model predicts and obtains a prediction category based on the impedance angle information. The method is used for identifying power transmission line faults caused by six reasons of lightning stroke, foreign matters, windage yaw, icing, pollution flashover and forest fire. Based on the Bayesian formula, the fault condition probability is calculated by using the fault cause information of the existing fault case and the impedance angle of the fault waveform, and the real fault cause is obtained.

The invention belongs to the technical field of insulator assemblies, and particularly relates to an insulator assembly for combined power equipment. Comprising a plurality of umbrella skirts, the tops of the umbrella skirts are provided with connecting caps, the bottoms of the umbrella skirts are provided with inserting rods, the adjacent umbrella skirts are connected through matching of the connecting caps and the corresponding inserting rods, the tops of the umbrella skirts are rotationally provided with rotating connecting assemblies, and the rotating connecting assemblies are connected with a plurality of cleaning assemblies. A cleaning brush and a driving fan blade are arranged on the cleaning assembly, and the driving fan blade can drive the cleaning assembly to rotate around the cleaning assembly under the driving of wind power, so that the top surface of the umbrella skirt is cleaned through the cleaning brush; the independent self-cleaning assembly is arranged on each umbrella skirt of the insulator assembly, the sweeping assemblies are driven by wind power to automatically clean the umbrella skirts, the pollution flashover risk is reduced, manual maintenance dependence is reduced, and the long-term operation reliability of power equipment in a severe environment is improved.

The invention relates to the technical field of insulator operation and maintenance management, in particular to a hard insulator pollution flashover risk prediction method and system considering micrometeorological conditions. Comprising the following steps: acquiring micrometeorological monitoring data and regional pollution source information of a target power transmission corridor and first, second and third parameters of each insulator in a line, wherein the first, second and third parameters represent hydrophobicity, surface hardness and effective creepage distance respectively; identifying a first time window meeting a condensation condition and a second time window meeting a pollutant sedimentation condition based on the micrometeorological data; correcting the first time window in combination with the first parameter of the insulator, and evaluating the irreversible contamination probability grade according to the second parameter and the regional pollution source information; determining a dynamic pollution flashover risk level and performing early warning by traversing the risk mapping table by taking a third parameter as a reference and combining an actual window and a probability level; according to the method, the structural characteristics of the insulator material and the microclimate and regional pollution conditions are combined, the pollution flashover risk is accurately and dynamically predicted and graded early warned, and the operation and maintenance decision pertinence of the mixed line is improved.

The application provides a method for testing and evaluating hydrophobicity and hydrophobicity migration of anti-pollution flashover silicone rubber insulation coating, and a testing method, which comprises the following steps: obtaining pollution of silicone rubber insulation coating; pretreating the pollution, loading the pollution into a sample tube to form a sample column; connecting the sample tube with an upper container and a lower air pressure tube after sealing the sample tube; injecting water into the container, and recording the penetration depth of the water into the sample column l or air pressure difference p , and calculating the slope k ; using a reference solvent to obtain the slope k 0; and obtaining the contact angle. By using the method, the hydrophobicity of actual pollution generated during operation of the silicone rubber insulation coating is verified, and good results are obtained. The method can be applied to testing of hydrophobicity and hydrophobicity migration of the insulation coating, thereby providing a universal and accurate testing method.

The invention relates to the technical field of electrical insulating materials, in particular to an anti-pollution flashover coating for electrical equipment and a preparation method of the anti-pollution flashover coating for the electrical equipment, and the anti-pollution flashover coating comprises the following components in parts by weight: 35-45 parts of hydroxyl-terminated polydimethylsiloxane; 10 to 15 parts of short-chain fluorosilicone modified resin; 3-5 parts of a bio-based hydrophobic modifier; 3-5 parts of hydrophobic modified nano silicon dioxide; 1-3 parts of core-shell structure titanium dioxide and zinc oxide; 0.5 to 1.5 parts of nanometer aluminum oxide; 8-12 parts of calcium carbonate whisker; 15 to 20 parts of aluminum hydroxide; 2 to 4 parts of low molecular weight polydimethylsiloxane; 1-2 parts of a composite coupling agent; 2-4 parts of a cross-linking agent; 0.5 to 1.0 part of a catalyst; 0.3 to 0.5 part of an antioxidant; by constructing a three-level micro-nano structure, the super-hydrophobic performance is achieved, the water contact angle is 165 degrees, and the rolling angle lt is achieved; therefore, the hydrophobic performance of the surface is improved.

The application discloses an insulator selective jet flow modification and gradient coating spraying integrated method and system, and relates to the field of high-voltage outer insulation material surface treatment technology. The method comprises the following steps: dividing a composite insulator into regions to obtain composite insulators in each sub-region; determining composite insulators in a modified region and composite insulators in an unmodified region from the composite insulators in each sub-region; shielding the composite insulators in the modified region, and pre-treating the surface of the composite insulators in the unmodified region by using atmospheric pressure plasma; spraying a fluorine-containing or silane-containing nano coating on the surface of the pre-treated composite insulator, and performing temperature curing to form a composite hydrophobic layer, so as to obtain modified composite insulators; and measuring performance parameters of the modified composite insulators, and determining the performance of the modified composite insulators according to the measured performance parameters. The application can improve the hydrophobic performance and pollution flashover resistance of the insulating material.