699 results about "Pollution flashover" patented technology

The invention provides a composition for an anti-pollution flashover coating and the anti-pollution flashover coating. The composition comprises the following components in part by weight: 25 to 40 parts of hydroxyl-terminated polyorganosiloxane, 5 to 15 parts of hydroxyl-terminated fluorine-containing polyorganosiloxane, 6.0 to 8.0 parts of nanometre silicon dioxide, 2.5 to 3.5 parts of nanometre calcium carbonate, 4.8 to 5.5 parts of cross-linking agent, 3.5 to 4.5 parts of wetting agent, 0.8 to 1.3 parts of silane coupling agent and 0.2 to 0.4 part of catalyst. The coating has the characteristic of long-term anti-pollution flashover effect and greatly improves the hydrophobicity, the hydrophobicity migration property, the tear strength, the shear strength, the acid and alkali resistance, the self-cleaning property and the aging property of a coating. The performance indexes of the coating are designed according to the actual needs of operation of electric equipment and by combining the development level of an organic silicon fluorine material. Requirements and limitations on the operation and maintenance of the equipment operating can be reduced to the maximum degree on the premise of guaranteeing the long-term anti-pollution flashover performance of the equipment.

The invention discloses a fluorosilicone rubber nano-composite alloy triplicate-prevention paint and the production method. The organic silicon provided with hydroxyl is introduced into the carbon resin, and is dispersed into resin polymerize and cross-linked by a variety of polymer resin via nano-particle which is processed by nano-dispersion solution; and then the fluorosilicone rubber nano-composite alloy triplicate-prevention paint which can resist salt spray, acid, alkali and impact; has strong adhesive attraction, strong resistance to elements, and heavy corrosion resistance; can prevent pollution flashover , and can drain for anti-icing is produced by modifying the obtained resin. The invention has high reaction energy and ultra-low surface energy, can resist chemical corrosion and electrochemical corrosion, has ability for resisting strong corrosion medium, has strong adhesive attraction and high reliability between paint film layers, can prevent water, oxygen and other corrosion mediums from destructing, can resist ultraviolet radiation, can resist temperature change, has super resistance to elements, has long coating maintenance usage duration, and is applicable to bad weather conditions and all kinds of strong corrosive environments.

The invention relates to a pollution flashover index forecasting method for a regional power grid, belonging to the technical field of transmission and distribution monitoring. The method of the invention comprises the following steps: (1) forecasting the current value of the equivalent salt deposit density in real time by an insulator surface equivalent salt deposit density forecasting model; (2) forecasting pollution flashover critical voltage by an insulator pollution flashover critical voltage forecasting model; (3) forecasting the insulator pollution flashover index of the power grid by a pollution flashover graded forecasting and prewarning model; and (4) judging the state. The invention has the advantages of providing a multivariable equivalent salt deposit density time sequence forecasting model based on phase space reconstruction, solving by a supporting vector machine model, solving the forecasting problem under the conditions of small sample of equivalent salt deposit density data and noise, and improving the forecasting prediction.

The invention relates to a current sensor for the polluted insulator leakage of an AC high-voltage electric transmission line, in particular to a current sensor for monitoring pollution flashover of an electric transmission line. The current sensor mainly comprises a Rogowski coil with an iron core, a copper shielding shell and a coaxial cable joint and is characterized in that the iron core of the Rogowski coil is in a two semi-circle ring shape and is provided with two windings; and the shielding shell consists of a hollow groove in the two semi-circle ring shape and an upper cover in the two semi-circle ring shape. The invention has the advantages of simple assembling and disassembling process, very convenient field assembly and disassembly, high leakage current measuring precision, wide frequency band, good linearity, safe and reliable operation, and the like, thereby being widely used for newly-established and operated high-voltage electric transmission lines.

The invention belong to the technical field of chemical coatings, and relates to anti-pollution flashover coatings for electrical equipment, in particular to the anti-pollution flashover coatings which can achieve a self-cleaning effect, and a preparation method thereof. The self-cleaning anti-pollution flashover coatings are prepared by end hydroxyl polysiloxane, white carbon black, modified flame retardants, micron extinction powder, pigment, crosslinking agents, catalysts and solvents according to designated weight portions. Through adding of micron particles and nano-silica on the surface structure of the self-cleaning anti-pollution flashover coatings to form a roughened surface provided with a micron-nanometer structure, namely, the micron-nanometer structure with the surface similar to lotus effects, so that the actual contact area of solid-liquid phase of the outer surface of the coatings is larger than the observed area on an apparent geometry. The hydrophobicity and adhesive attraction resistant action of the coatings are greatly enhanced, the coatings can have a self-cleaning ability, and anti-pollution flashover effects are greatly enhanced.

The invention provides a fluorinated silicone rubber anti-pollution flashover coating for extra-high voltage and a preparation method thereof; the fluorinated silicone rubber anti-pollution flashover coating (short for FRTV) has the following compositions by mass percent: 5-30 percent of fluorinated silicone rubber, 10-30 percent of silicon rubber, 4-8 percent of nanometer grade gas-phase white carbon black, 0.5-8 percent of compound fire retardants, 0.2-0.5 percent of firming agent, 0.01-0.05 percent of catalyst, 0.02-0.08 percent of antioxidant, 2-8 percent of flatting agents, 0.2-0.4 percent of de-foaming agent, 0.1-0.5 percent of paint and 30-60 percent of solvent. The compound fire retardant is composed of inorganic aluminium hydroxide and organic decabromodiphenyl oxide, wherein comprising 1-6 percent of the inorganic aluminium hydroxide and 0.5-3 percent of the organic decabromodiphenyl oxide. The preparing process of the coating is simple, and the coating has good weather ability, oil resistance and longer service life.

An RTV long-acting anti-pollution flashover paint of nano intensive style used in the insulating surface outside the insulator of electric power appliances, and the method for producing it. The dispense comprises the following components (weight percent): nana SiO2 for 2-6 percent; hydroxy-terminated dimethyl silicone polymer for 20-40 percent; cross linker for 1-6 percent; catalyst for 0.02-1 percent; solvent for 30-70 percent; pigment for 1-2 percent. The producing steps as follows: mixed reacting hydroxy-terminated dimethyl silicone polymer and cross linker and catalyst; adding nano SiO2 into the autoclave for strring to 100-150 Deg.C, dewatering it in the condition of vaccum and loading it in the sealed metal drum; adding solvent and pigment to mix homogeneously, after a filtering treatment, placing it in an air-tight container. The coating by the invention is provided with fine thixotropic property, and the ability of ultraviolet absorption and infrared ray reflection, so the mechanical strength improved dramatically, the rate of hydrophobic mobility increased, and the property of anti-pollution flashover improved further.

The invention discloses an intelligent detection method and a detection system device for a contaminated insulator and belongs to the technical field of contaminated insulator performance detection of a high-voltage transmission line. The method comprises the following steps of: hanging the detected contaminated insulator in an artificial fog room; adjusting a test power supply device so that a test program is adjusted to a working state; when an ultrasonic fog generator of the artificial fog room is started to fog to a saturated damping state, continuously increasing test voltage until the detected contaminated insulator is in a flashover state; acquiring the flashover voltage value by a data acquiring card; sending the flashover voltage value to an expert system, comparing the flashover voltage value with historical data in the expert system, and analyzing the data; and judging whether the detected contaminated insulator is safe or not. By the method and the device, the problems of poor accuracy of the test data and high investment of insulator string pollution flashover voltage test equipment in the prior art are solved, the external insulating level and the reliability of safe running of an insulator string are accurately judged, the probability of pollution flashover accidents is effectively reduced, and enormous indirect economic benefit is brought.

The invention relates to a method, a system and a device for measuring and calculating the external insulation pollution degree of an electric transmission and transformation device, wherein a spot pollutant accumulation measuring device automatically measures the electrical conductivity of pollutants by utilizing a conduction electrode on the surface of a simulation shed, data is transmitted into a central server for measuring and calculating the pollution degree and is converted into the equivalent salt density, the accumulation amount of external insulation pollutants before and after each rainfall can be measured immediately, and the accumulation amount on the external insulation surface pollutants at a measuring site is predicted according to the pollutant accumulation velocity so as to early warn the pollution flashover risk of the device.

The invention belongs to a technology of high-voltage or extra high-voltage power transmission overhead lines for electric power and wind power generation poles and towers, and relates to a pollution flashover-prevention, corrosion-prevention and freezing-prevention electric tower. The pollution flashover-prevention, corrosion-prevention and freezing-prevention electric tower is characterized by comprising a plurality of steel poles arranged together by bolts and flanges; a shot blasting-treated inner treatment layer, a sprayed epoxy zinc rich primer layer, an epoxy micaceous iron intermediate coat layer and a fluorocarbon finish paint layer are arranged on each steel pole matrix from inside to outside in sequence. The Pollution flashover-prevention, corrosion-prevention and freezing-prevention electric tower has the beneficial effects that the technical difficulties that the surfaces of the steel poles of the tower are hydrophilic because of being galvanized and are extremely easy to freeze at low temperature are overcome. The tower, the steel pole and a wind power generation tower tube produced by the technology are capable of achieving the goals of corrosion prevention, pollution flashover prevention and freezing prevention, respectively have a service life and are also economic and practical.

The invention relates to super-hydrophobic and anti-pollution flashover one-component adhesive, and a preparation method and application thereof, and belongs to the technical field of adhesives and coatings. The adhesive comprises the following components in part by mass: 100 parts of hydroxyl-terminated polysiloxane, 50 to 150 parts of fire retardant, 1 to 5 parts of hydrophobic enhancer, 0.2 to 2 parts of structure modifier, 3 to 15 parts of cross-linking agent, and 0.2 to 5 parts of catalyst. The method comprises the steps of performing vacuum drying treatment to the hydroxyl-terminated polysiloxane, reinforcing filler, the fire retardant, the hydrophobic enhancer and the structure modifier which are mixed for 1 to 3 hours at 80 to 150 DEG C, cooling the mixture, feeding the cross-linking agent and the catalyst to the mixture, uniformly mixing, and then obtaining the adhesive. The adhesive can be dissolved in organic solvent and then is served as coating. The adhesive has the advantages that the adhesive can be directly used, the bonding strength is high, the flame retardant rating is high, the pollution prevention effect is good, the technology is simple, the controllability is good, the adhesive can be directly used and can also be dissolved in solvent to perform coating operation, and the like.

The invention discloses a solvent-free anti-pollution flashover organic silicon coating which comprises the following components in parts by weight: 100 parts of polysiloxane containing at least two silicon vinyl groups, 1-20 parts of polysiloxane containing at least two silicon oxygen groups, 5-25 parts of white carbon black, 10-40 parts of a flame-retardant filler, 10-35 parts of a vinyl-containing silicon resin, 2-8 parts of a water repellent, 0.1-10 parts of platinum catalyst and 1-5 parts of a tackifier, wherein the specific surface area of silica in the white carbon black is 150-250m<2>/g, and the average particle size does not exceed 20 microns. The invention also discloses a method for preparing the solvent-free anti-pollution flashover organic silicon coating. The method comprises the following steps: (a), preparing a basic sizing material and (b) mixing the glue; or (a) preparing a basic sizing material; (b), preparing a component A; (c) preparing a component B; and (d) mixing the glue. After being subjected to room temperature or medium temperature curing, the solvent-free anti-pollution flashover organic silicon coating is dried, fine, smooth and bright in surface and excellent in hydrophobic property and has excellent self-cleaning performance, and the surface rainwater and floating dust can be automatically flushed away. In addition, the solvent-free anti-pollution flashover organic silicon coating has excellent aging performance, mechanical properties, high/low-temperature resistance, arc resistance, electric insulation performance and the like.

An insulator electrified cleaning agent is composed of, by weight, 60-90 parts of a solvent dimethyl carbonate, 15-30 parts of a cosolvent ethylene glycol derivative, 5-10 parts of a nonionic surfactant, 2-5 parts of an abrasive agent nanocrystalline metal oxide, 1-5 parts of a diffusant dichloromethane, 0.5-2 parts of a washing aid N-alkyl pyrrolidone, 0.2-1 part of a stabilizing agent cocomut oil die thanolamide and 1-3 parts of polymethyl siloxane. The cleaning agent can effectively remove stains on the surface of an insulator anti-pollution flashover coating in a high saline and sodic environment with high industrial pollution and recover excellent hydrophobicity and hydrophobic migration of the insulator surface. Thus, the cleaning agent has the capability of effectively guaranteeing safe operation of electrical equipment.

A 10kV power distribution circuit insulation tower head is disclosed, which is characterized in that: adopting hydrophobic high-strength insulation bar to be assembled with needle-typed insulator by gold tool and form an insulation tower head entity, or adopting hydrophobic high-strength insulation bar to be assembled with gold tool directly and form an insulation tower head. By using the invention, the insulation level of the power distribution circuit can be greatly improved, the thunder discharge air gap can be obviously enlarged, the lightning stroke and line break accidents can be effectively prevented and the climbing distance can be expanded, further, the structure type is easy to improve self-cleaning ability and the occurrence of pollution flashover can be basically and completely precluded, which is beneficial in charged operation, simple in operation process and improves the operation security.

The present invention provides a kind of room temperature silicon sulfide rubber composite nano material pollution flashover resisting coating capable of raising pollution flashover voltage function. Its raw material composition includes 3%-10% of dihydroxypolymethylvinylsiloxane and 12%-20% of dihydroxypolydimethylsiloxane as main material, 0.3%-10% of nano silicon dioxide and 0.3%-10% of nano titanium dioxide as filling material and 50%-65% of diluting agent. Said coating can be used as coating material for coating or brushing surface of insulating body of high-voltage power equipment.

The invention relates to a detection method for filthy conditions of insulator images and belongs to the field of electric transmission line equipment operation condition overhaul and computer vision. By the aid of the detection method for the filthy conditions of the insulator images, the problems that detection steps are cumbersome, safety is low, and evaluation criteria lack adaptivity in detection schemes for the filthy conditions of the insulator images in the traditional technology are solved. According to the method, the insulator contamination degree is detected by training condition detection models of three sub classifiers of the insulator images through a robot learning method according to different color characteristics of the insulator images under different contamination conditions. The filthy conditions of insulators can be analyzed accurately, reliably, quickly and effectively, so that a basis is provided for cleaning insulator filth in time, and accidents of pollution flashover power outage of the insulators are reduced. The detection method is suitable for detecting the filthy conditions of the insulator images quickly and accurately.

The invention discloses an anti-pollution flashover coating and a preparation method thereof. The anti-pollution flashover coating consists of the following compositions in part by weight: 20 to 40 parts of hydroxyl-terminated polyorganosiloxane, 4 to 8 parts of modified silicon fluorine resin, 1 to 3 parts of small molecular siloxane, 3 to 6 parts of nanometre silicon dioxide, 1 to 3 parts of decabromdiphenylethane (DBDPE), 1 to 3 parts of wollastonite, 4 to 8 parts of aluminium hydroxide, 1 to 2 parts of pigment, 1 to 6 parts of crosslinker, 0.02 to 1 part of catalyst and 30 to 60 parts of solvent, wherein the small molecular siloxane is trimethyl end-capped polydimethylsiloxane; the catalyst is dibutyltin dilaurate or stannous octoate; and the solvent is a mixed solvent of dimethylbenzene and butyl acetate in a weight ratio of 3:1-5:1. The prepared coating has the advantages of high flame retardant grade and good anti-pollution effect.

The invention relates to a configuration method of a high-voltage transmission line insulator, belonging to the technical field of transmission line insulation design of a power system. The method comprises the steps as follows: firstly, a mapping table is established according to the existing experience or the corresponding standards, thereby estimating the string length of the insulator to be selected, wherein the insulator is needed in line design; the insulator to be configured is chosen according to the string length of the insulator in the mapping table and mechanical requirements; for a specific insulator to be configured, the salt deposit density of the operated insulator is calculated and the pollution flashover voltage is acquired by the data of the pollution test; in consideration of revisions of a plurality of affection factors, the withstand voltage of the insulator to be configured is calculated and the string length of the insulator is determined according to the target voltage of the line to be designed; and finally, the string length and the string length threshold in the mapping table are calibrated, thereby determining final insulation configuration result. The method realizes two functions of insulator type selecting and size configuration and directly uses the results of the pollution test to calculate, so as to ensure the precision and reliability of insulator configuration to meet the requirements on line pollution outer insulation design.

The embodiment of the invention discloses an anti-pollution flashover coating spraying device, an anti-pollution flashover coating spraying method and an anti-pollution flashover coating protective coating and relates to the technical field of anti-pollution flashover and solves the technical problems in the prior art that a power transmission line is difficult to spray, and the coating quality cannot reach better anti-pollution flashover capacity. The anti-pollution flashover coating device comprises a spray gun, a coating supplying device, an assistant air supplying device and a power source, wherein a coating output port of the coating supplying device is communicated with a coating inlet of the spray gun, and the spray gun can spray input air at the periphery of anti-pollution flashover coating in an air curtain manner so as to lead the air curtain to wrap the aerial-fog-shaped anti-pollution flashover coating. The anti-pollution flashover coating method comprises the steps of simultaneously spraying the air curtain which can wrap the coating at the periphery of the sprayed aerial-fog-shaped anti-pollution flashover coating. According to the device and the method, the portability of the anti-pollution flashover coating spraying device is improved, the anti-pollution flashover coating spraying device is suitable for the field operation, and the anti-pollution flashover coating spraying quality is improved.

The invention discloses a cleaning system for a top insulator of an electric locomotive. The cleaning system mainly comprises an air compressor, a vortex tube and a high-pressure hot air spray heads. By reasonably arranging the positions and quantity of the air spray heads, the surface temperature and dryness of the top insulator can be increased under the condition of not influencing the work and safety of a top high-voltage pantograph system, and water, ice, snow and dirt sticking to the top insulator are blown off to prevent the formation of pollution flashover conditions. Thus, the running reliability of the electric locomotive under a severe climate environmental condition is enhanced, economic losses of a railway transport system caused by various pollution flashover accidents are reduced, and the labor intensity of relevant operation and maintenance personnel is lowered.

The invention discloses a method for predicting a flashover voltage by using a surface conductivity and a leakage current. A surface conductivity of an insulator is measured; by using the surface conductivity of the insulator as an input parameter and combining a form factor parameter of the insulator, a dynamic arc model is established, a leakage current development trend is calculated to obtain a minimum flashover voltage of an insulator string, and the insulation margin and the external insulation level of the insulator are judged on the basis of the minimum flashover voltage. According to the invention, the whole conductivity of the insulator string is measured actually, the leakage current development trend is calculated by using the dynamic arc model, the change rule of the leakage current and the arc length with the time is described by using the arc dynamic model through a mathematical equation and more accords with the actual condition, and the purpose of insulation state judging and pollution flashover pre-warning is realized.

The invention discloses an insulator pollution flashover pre-warning method and system based on leakage currents. An insulator pollution flashover pre-warning test system and the pollution flashover pre-warning method are provided based on deep study carried out on the acquiring of the leakage currents of supporting insulators, signal processing and extraction of characteristic quality. The test system comprises an LED optical fiber sensor, a signal preprocessing module, a data collecting module, a signal transmitting module, a power supply module and a data collecting and analyzing module. Through the utilization of the test system, pollution flashover measurement data are obtained, and finally a neural network model is obtained. The invention further provides the insulator pollution flashover pre-warning system based on the neural network model obtained through the scheme. Effective values, amplitude values, the number of pulses and relative humidity of the environment where the insulators located are regarded as input quantity of the neural network model to obtain the pollution grade of the insulators.

The invention relates to a compound material pole tower. A main body of the pole tower adopts a compound material; a main connecting part adopts compound material or galvanized steel; a lead cross armadopts a compound insulator; a ground lead cross arm adopts galvanized steel; a downlead cross arm adopts galvanized steel adopts galvanized steel; a grounding downlead adopts wires and bars; the upper end of the grounding downlead is fixed on the grounding wire cross arm, is led from leads at the outside of one side or two sides of the pole tower, is fixed on the downlead cross arm to lead the grounding downlead and the lead to keep fixed distance, and is grounded from the downlead cross arm along the tower body. Compared with the conventional 110kV iron tower, the compound material pole tower greatly increases phase-earth and interphase air gaps and insulating creepage distance of a tower head, greatly improves pollution flashover resistance, ice flashover resistance, windage yaw prevention and lightning-resistant level, also can compress the size of the tower head, and has the advantages of reducing the cost as well as expenses for transportation, installation and maintenance of the pole tower body and simultaneously reducing the width of a line corridor.

The invention discloses monocomponent PRTV anti-pollution-flashover paint and a preparation method thereof. The monocomponent PRTV anti-pollution-flashover paint is composed of the following materials in parts by weight: 28-38 parts of polydimethylsiloxane, 10-19 parts of hydroxyl-terminated fluorine-containing polysiloxane, 3-5 parts of nanometer silica, 1-3 parts of a coupling agent, 0.5-1 part of a catalyst, 2-3 parts of decabromodiphenyl ether, 1-2 parts of a pigment and 40-50 parts of a solvent. The monocomponent PRTV anti-pollution-flashover paint has the beneficial effects that a fluorine material and a nanometer material are organically combined and blended with silicone rubber, silicone rubber is taken as main base rubber and fluorosilicone rubber is taken as auxiliary base rubber; and the monocomponent PRTV anti-pollution-flashover paint has the main technical advantages of being good in flame retardant effect, substantially reduced in cost.