75 results about "Surface discharge" patented technology

The invention relates to the technical field of bushing detection, and discloses a bushing insulation state detection method based on multi-parameter real-time monitoring. The method comprises the following steps: acquiring multi-dimensional monitoring data such as a partial discharge pulse sequence, dielectric loss angle tangent value fluctuation data and surface leakage current density distribution in a bushing operation environment in real time; carrying out insulation defect feature extraction on the data set, and generating an insulation defect distribution map containing a creeping discharge track, an internal air gap position mark and a carbonization channel density index; high-risk and potential defect areas are divided by adopting a dynamic threshold segmentation algorithm, boundary coordinates are determined, and an insulation state evaluation vector containing parameters such as a surface discharge intensity index and the like is constructed according to the boundary coordinates; and inputting the vector into a pre-trained insulation aging prediction model, and outputting a bushing residual insulation life estimated value and a defect development priority sequence. According to the method, all-around accurate monitoring and pre-judgment of the insulation state of the sleeve are achieved, and scientific support is provided for operation and maintenance decision making of the sleeve.

A TinyMaix-based switch cabinet partial discharge detection and identification algorithm comprises the following steps: designing four typical insulation defect models, and respectively simulating corona discharge, suspension discharge, surface discharge and internal discharge; 200 samples are collected for each insulation defect, a sample set of 800 samples is formed in total, and a phase-resolved partial discharge (PRPD) graph is constructed according to a phase value in combination with a power frequency synchronization signal; the method comprises the following steps: dividing a power frequency sine wave into 360 phase windows, calculating a discharge frequency and a discharge amplitude average value in each phase window, constructing pulse counting distribution # imgabs0 # and average pulse amplitude distribution # imgabs1 #, extracting a probability pwin, a mean value mu and a variance sigma, and further calculating 19 statistical characteristics such as skewness Sk; a mean square error is selected as a loss function in each iteration of model solution, model parameters are updated according to the gradient of the loss function, and model convergence is accelerated; and inputting a partial discharge signal to be detected into the trained model, and outputting a classification result of the signal by the model to realize identification and classification of the partial discharge signal.

The invention provides an offshore wind power GIS equipment partial discharge mode identification method based on an improved SAE network, and belongs to the technical field of electrical digital data processing.The method includes the steps that a partial discharge experiment platform meeting the IEC60270 standard is constructed, four typical defect models are designed, and PRPD spectrograms are collected; hSV color space threshold segmentation is utilized to remove interference elements, and image features are enhanced in combination with a partial discharge physical mechanism equation. The improved SAE network integrates a three-layer convolution encoder and an up-sampling decoder, introduces an ECA attention mechanism to optimize a feature channel weight, and combines a pre-trained # imgabs0 # PDCN model to enhance the feature extraction capability. Physical parameter constraints are introduced in the training process, and after global pooling dimensionality reduction and full connection layer processing, high-precision identification of four defect types of point discharge, creeping discharge, air gap discharge and suspended metal discharge is realized, and the technical problems of low accuracy and poor generalization ability of offshore wind power GIS equipment partial discharge mode identification are solved.

The invention relates to the technical field of ozone control, in particular to a creeping discharge ozone control optimization method, which comprises the following steps: acquiring temperature, humidity, voltage and ozone concentration data based on a discharge device, performing proportion conversion and optimization, extracting trend characteristic factors, screening nodes according to relevance, and sequencing to obtain a creeping discharge ozone control model; the combined effect of electricity, temperature and humidity on ozone change is analyzed, the regulation and control unit is identified, and load distribution configuration is optimized. According to the invention, normalization processing is carried out on temperature, humidity, electrical and ozone concentration data collected in a region, a data linkage mechanism with temperature and humidity change as a core is constructed, node response performance is dynamically sequenced, and periodic data change is fused, so that a set of control flow for cooperatively adjusting temperature, humidity and electrical parameters is formed; real-time adjustment of partitioned loads and dynamic optimization of energy distribution are realized, agile response and multi-region difference matching capability of ozone generation regulation are brought, and the stability under ozone yield fluctuation is improved.

The invention provides a GIS equipment partial discharge type classification method based on partial discharge time domain signals, and belongs to the field of partial discharge detection and classification. The problem that the method for judging the partial discharge type through the partial discharge mode spectrogram fails due to the fact that an externally applied voltage signal cannot be obtained in the field detection process is solved. The method comprises the following steps: respectively acquiring time-domain data sets of partial discharge light of a sample in the occurrence process of three partial discharge phenomena of corona discharge, surface discharge and suspension discharge through an experimental platform, and preprocessing the time-domain data sets; adopting a dual-threshold peak searching method to perform dual-threshold peak searching on data in the time domain data sets of the three types of preprocessed partial discharge light to obtain corresponding partial discharge peak data sets, and processing the partial discharge peak data sets into corresponding partial discharge light signal amplitude difference spectrograms; partial discharge type classification is realized through the partial discharge optical signal amplitude difference spectrogram; the method is applied to partial discharge detection of the GIS equipment.

The invention discloses a cable partial discharge on-line detection method based on a non-calibration pulse current method, which belongs to the field of power equipment partial discharge detection, and comprises the following steps of: designing four typical insulation defect models by combining actual operation and detection conditions of a cable, and respectively simulating corona discharge, suspension discharge, surface discharge and internal discharge; building an experimental platform, coupling partial discharge pulses by using a bushing sensor, and providing a phase synchronization signal; through the designed matching impedance circuit, the capacitance value of the bushing sensor can be measured. According to the function relationship established between the capacitance value and the discharge conversion coefficient, the partial discharge amplitude is rapidly estimated; a partial discharge pulse signal is collected by a pulse current method partial discharge sampling system, and a phase resolution partial discharge (PRPD) graph is constructed according to a phase value in combination with a power frequency synchronization signal.

The invention discloses a monitoring and positioning method and system for surface discharge of an overhead line system insulator, and belongs to the technical field of electrical equipment fault detection. The method comprises the following steps: step 1, installing a microphone sampling module on a connecting pipe of a cantilever insulator shoulder frame of the overhead line system; 2, constructing a three-dimensional coordinate system by taking the microphone sampling module as a center; step 3, acquiring a frequency range of a railway insulator surface discharge ultrasonic signal, and setting an acquisition frequency range of a microphone acquisition module; 4, ultrasonic signals generated by insulator surface discharge are detected through a microphone sampling module, sound source space energy summation is conducted through a random array delay summation beam forming algorithm, and then the position coordinates of a discharge point are calculated according to the distance; and step 5, generating a fault alarm in combination with a set threshold criterion. According to the method, millimeter-level positioning of insulator surface discharge is realized through fusion of the acoustic array and the adaptive algorithm, and the method has the characteristics of high electromagnetic interference resistance and high response speed.

The invention provides a method for detecting partial discharge in a high-voltage switch cabinet, and the method comprises the steps: receiving an ultrasonic signal and an ultraviolet signal which are generated by the partial discharge in the high-voltage switch cabinet and are synchronously collected by an acousto-optic integrated sensor probe in real time, and carrying out the preprocessing; performing phase distribution PRDP spectrum feature analysis on the preprocessed ultrasonic signal and ultraviolet signal to obtain ultraviolet intensity and ultrasonic intensity, and inputting the obtained ultraviolet intensity and ultrasonic intensity into a trained discharge classification model at the same time to obtain a partial discharge type in the high-voltage switch cabinet; wherein the partial discharge types comprise corona discharge, surface discharge and internal discharge. By implementing the method, the defects of a traditional partial discharge detection method can be overcome, and the discharge energy level and the risk degree can be quantitatively evaluated and tracked.

The invention relates to the technical field of high-voltage direct-current cables, in particular to a load circulation system of a high-voltage direct-current cable system and an operation method, and the system comprises a temperature circulation module which comprises a PID temperature control unit and a conductor heating unit, and the conductor heating unit is electrically connected with the PID temperature control unit; the multi-polarity voltage loading unit is provided with a high-voltage source, and the high-voltage source can output voltage from the negative polarity to the positive polarity; and the distributed electric field sensor is embedded at the interface of the cable accessory stress cone and the insulation, and the distributed electric field sensor is in contact with the surface of the cable accessory stress cone. The method has the beneficial effects that the tangential electric field distribution at the cable accessory stress cone and the insulation interface is monitored in real time through the distributed electric field sensor, and the maximum electric field intensity is reduced in combination with the low ripple design of the multi-polarity voltage loading unit and the design of the interface conductivity matching layer, so that the electric field distortion and the surface discharge risk are effectively inhibited, and the reliability of the cable accessory is improved. And the operation stability of the high-voltage direct-current cable system under complex working conditions is improved.

The invention provides a metal particle morphological characteristic on-line diagnosis system, method and device and a medium, and relates to the field of power systems, and the system is characterized in that a core photosensitive element of an optical sensing module is a silicon photomultiplier tube array; the direct current power supply module comprises a direct current-direct current conversion circuit and is connected with the optical sensing module; the power supply phase measurement module comprises a voltage dividing capacitor and a voltage transformer, and the voltage dividing capacitor is connected with the voltage transformer; the input end of the data acquisition module is connected with the optical sensing module and the voltage transformer; the edge computing device comprises a data processing module and a particle morphological feature recognition module, the input end of the data processing module is connected with the output end of the data acquisition module, and the output end of the data processing module is connected with the input end of the particle morphological feature recognition module. The particle morphological feature recognition module is used for outputting morphological feature parameters of the metal particles causing creeping discharge.

This invention discloses a high-voltage resistivity testing device for samples. The small sample to be tested consists of an insulating cardboard with a pre-cut opening in the middle, a small sample of a pre-sized size, and polyimide tape. The small sample is attached to the opening of the insulating cardboard with the polyimide tape, allowing for volume resistivity measurement even on small samples. The insulating cardboard increases the creepage distance and reduces leakage current. The spring ensures full contact between the protective electrode and the measuring electrode and the small sample. The current flowing through the sample is exactly the current flowing on the electrode in contact with the small sample. The full contact between the protective electrode and the insulating cardboard effectively conducts surface current. This invention solves the technical problem of traditional solid insulating material resistivity testing methods, which are prone to creepage and even surface discharge under high voltage, high field strength, and small sample size conditions, affecting the accuracy of the test.

The application belongs to the technical field of transformer partial discharge identification, and discloses a transformer partial discharge intelligent identification method based on deep learning, which constructs an electroacoustic thermal three-mode acquisition architecture, captures 1ns level discharge pulses through a high-frequency current sensor, avoids sound field superposition interference by reasonably arranging an ultrasonic sensor on the oil tank wall, focuses on the easy discharge area to collect thermal signals through an infrared thermal imager, and synchronously obtains working condition parameters such as load rate and oil temperature; subsequently, the effective signal segments are retained through a multi-modal signal cross-correlation matrix, and the interference signals with large deviations are removed, then different networks are used to extract electroacoustic thermal characteristics, the coupling characteristics are calculated by combining the physical constraint layer weight and the cross-field interaction layer, and the key characteristics are retained; the feature overlap of air gap and surface discharge is effectively reduced, the influence of high-frequency interference and signal distortion is reduced, the partial discharge identification precision is improved, the samples are expanded and the fault and normal sample ratio is reasonable through time stretching and additive noise processing.

The invention discloses a high-voltage unmanned aerial vehicle electricity testing device, relates to the technical field of electricity testing devices, and aims to solve the problems that an existing high-voltage electricity testing device needs to be manually moved to the position, needing to be detected, of an electric tower for detection, the detection work risk degree is high, the detection efficiency is low, an insulator can be degraded and aged after long-term operation, and the detection cost is high. The invention relates to an electricity testing device for an insulator, and aims to solve the problems that various dirt accumulates on the surface of the insulator, the accumulation of the dirt affects the insulation performance of the insulator, a dirt layer forms a conductive path, the surface of the insulator discharges, and the detection result of a tester is affected. The electricity testing device body is fixedly mounted above an unmanned aerial vehicle, and a fixed seat is fixedly mounted at the lower end of the electricity testing device body; an electricity testing box is fixedly installed at the upper end of the fixing base, testing rods are symmetrically installed at the front end and the rear end of one side of the electricity testing box, a dry ice cleaning mechanism is fixedly installed in the middle of one side of the electricity testing box, and a dry ice cleaning nozzle adjusting mechanism is slidably installed in a dry ice cleaning driving frame.

The invention provides a high-voltage power grid surface discharge automatic monitoring system based on a solar-blind ultraviolet high-speed ICMOS and a PMT, and the system comprises a to-be-monitored high-voltage power grid region, the solar-blind ultraviolet PMT, a monitoring system central control system, the solar-blind ultraviolet ICMOS, a solar-blind ultraviolet band-pass optical filter, a visible light camera, a networking image transmission system, and a real-time monitoring terminal. According to the system, a solar-blind ultraviolet high-speed ICMOS imaging device is adopted, a solar-blind ultraviolet photomultiplier (PMT) is used as a triggering condition, and real-time unmanned all-weather surface discharge monitoring of a specific power grid area is achieved through an acquisition system and a network transmission assembly. The system works in a 200-280nm solar blind ultraviolet region, and has the advantages of visual discharge process and position, wide monitoring range, strong anti-interference capability and the like.

The present invention provides a device and method for visually detecting the surface discharge ionization region, relating to the field of high-voltage discharge ionization measurement technology. The device includes a closed cavity, a ground electrode, a high-voltage electrode, a heating tape, an infrared camera, a computer, a detection impedance, an amplifier, and an oscilloscope. The heating tape is wrapped around the ground electrode and is used to heat the insulator through the ground electrode. The high-voltage electrode is used to apply voltage to the insulator and stimulate defect discharge on the insulator to ionize the insulating gas and form a gas ionization region. An observation window is provided on the side wall of the closed cavity. The infrared camera is disposed outside the closed cavity and facing the observation window. The infrared camera is used to photograph the gas ionization region and display the captured temperature distribution image on the computer. The detection impedance is used to measure the amount of local discharge and display it on the oscilloscope after amplification. The device and method can visualize the surface discharge ionization region of defective insulators and achieve online dynamic observation.

The present application relates to power equipment insulation detection technology, and particularly relates to a partial discharge ultrasonic and ultra-high frequency integrated sensor performance test method, which is used for testing the following discharge insulation defects, respectively: corona discharge defects; air gap discharge defects; surface discharge defects; free particle discharge defects; and suspended discharge defects; the test method comprises: testing the breakdown voltage under different discharge insulation defects; a partial discharge ultra-high frequency signal sensing performance test method, a partial discharge ultrasonic signal sensing performance test method, and a partial discharge ultrasonic signal and ultra-high frequency signal simultaneous sensing performance test method. By using the method, the sensing performance of the partial discharge ultrasonic and ultra-high frequency integrated sensor on the partial discharge signal of the power equipment can be conveniently and quickly tested in the laboratory and the power field.

The invention provides a method for testing the vacuum surface dielectric resistance of a chip multilayer ceramic dielectric capacitor, and the method is characterized in that the method comprises the steps: preparing a sample; the vacuum test system comprises a thermal vacuum test platform (29), a programmable power supply (1), a power distribution device (4), a power distribution power supply (8), a matrix switch (11), a discharge device (18) and an oscilloscope (21), and the power distribution device (4) comprises a change-over switch (30), a power distribution tube (31) and a slide rheostat (35); preparing a vacuum environment; a thermal vacuum test using a distribution tube; a thermal vacuum test only using the programmable power supply (1); testing the next group of vacuum environment; releasing a vacuum environment; and ending the test. According to the invention, products with low vacuum surface discharge thresholds can be identified in advance, users are warned of selection risks, and optimal design of manufacturers can be promoted, so that the inherent reliability of the products is improved, and the application requirements of thermal vacuum environments in the aerospace field are further met.

The invention discloses a method for improving the insulating capacity of a vacuum CuCr contact and the prepared CuCr contact, and belongs to the field of manufacturing of environment-friendly vacuum switch equipment. The method comprises the following steps: carrying out electron beam remelting treatment on the surface of the CuCr contact to form a remelting layer; the remelted layer is subjected to milligram energy treatment to refine grains and reduce surface roughness. According to the method, a process of combining electron beam remelting and milligram energy treatment is adopted, and the surface of the CuCr contact is subjected to composite modification to form a fine grain layer and realize mirror surface smoothness, so that the surface discharge tendency is remarkably reduced, the insulating strength is improved, and the aging time is greatly shortened.

The application provides a GIS device partial discharge type classification method based on a partial discharge time domain signal, and belongs to the partial discharge detection classification field; solves the problem that a partial discharge type judgment method based on a partial discharge mode spectrum is invalid due to the failure to obtain an externally applied voltage signal in a field detection process; the method comprises the following steps: collecting and preprocessing time domain data sets of partial discharge light of a sample in the occurrence processes of three partial discharge phenomena of corona discharge, surface discharge and floating discharge through an experimental platform; performing double-threshold peak searching on the data in the three preprocessed time domain data sets of partial discharge light respectively by using a double-threshold peak searching method, obtaining corresponding partial discharge peak value data sets, and processing the partial discharge peak value data sets into corresponding partial discharge light signal amplitude difference spectrum diagrams respectively; and realizing partial discharge type classification through the partial discharge light signal amplitude difference spectrum diagrams; and the application applies the GIS device partial discharge detection.

The present invention provides a customized full-surface discharge underfloor air distribution system which supplies, by means of the pressure differential between a floor space (10) and an indoor space (20), air from the floor space (10) toward the indoor space (20) through a plurality of supply holes (110) of a floor panel (100) provided between the floor space (10) and the indoor space (20) and a plurality of discharge holes (201) of a floor finishing material (200) provided on the floor panel (100), and which is for providing various pressure differentials and airflow rates according to the size and heat load of the indoor space (20), wherein the discharge hole (201) of the floor finishing material (200) is smaller than the supply hole (110) of the floor panel (100), the plurality of discharge holes are gathered together to form a discharge hole group (210), the floor panel (100) and the floor finishing material (200) are provided such that respective discharge hole groups (210) are positioned above respective supply holes (110), the floor panel (100) is one from among a low-airflow-rate floor panel (100a), a middle-airflow-rate floor panel (100b) and a high-airflow-rate floor panel (100c) that have different numbers of supply holes (110), the floor finishing material (200) is one from among a low-airflow-rate floor finishing material (200a) and a high-airflow-rate floor finishing material (200b) that have different arrangement structures of the discharge holes of the discharge hole groups (210), the discharge hole group (210) of the low-airflow-rate floor finishing material (200a) is a linear discharge hole group (210a) structured to have three or more discharge holes (201) arranged in a line, and the discharge hole group (210) of the high-airflow-rate floor finishing material (200b) is a polygonal discharge hole group (210b) structured to have three or more discharge holes (201) arranged in a polygonal shape, and thus the present invention can provide various pressure differentials and airflow rates according to the size and heat load of the indoor space, can adjust the airflow rate to be constant so as to be efficient, easily responds to changes in heat load, and can solve the problem of indoor air quality deterioration caused by an adhesive.

The invention provides an energy-saving bus duct with a high protection grade, and relates to the technical field of bus ducts. The energy-saving bus duct with the high protection level comprises an inner shell, an outer shell, a negative pressure pump, a dust removal box, a controller and a plurality of groups of conductors packaged in the inner shell. According to the invention, through cooperation of the independent heat dissipation cavity and the multi-stage heat dissipation structure, directional heat dissipation can be carried out on local overheat points of the bus duct, energy waste caused by a traditional overall heat dissipation scheme is avoided, and the problem of low energy efficiency ratio caused by global forced heat dissipation in the prior art is effectively solved. The movable dust removal structure is matched with the negative pressure system, conductive dust accumulated on the surface of the shell is automatically removed, the cooling efficiency reduction and surface discharge risks caused by dust accumulation are prevented, and the defect that the self-cleaning function is lacked in the prior art is overcome.

The invention relates to the technical field of power transmission and distribution equipment manufacturing, in particular to a GIL three-post insulator sliding contact pole integrated complete device and a GIL assembly thereof, which comprise a metal closed shell, a three-post insulator, a particle capturing device and an integrated complete device, the sliding contact electrode integrated complete device is composed of a sliding contact electrode, a contact electrode spring, a nylon lining and a fixed base and is fixed through a limiting bolt and a fastening nut to form a pre-press-fit state, after the device is installed, the sliding contact electrode keeps stable contact with the metal closed shell under the action of the spring, the conductivity is ensured, the nylon lining is provided with a particle collecting groove, and the particle collecting groove is used for collecting particles. The metal particles are effectively captured and prevented from permeating to the surface of epoxy resin by combining the particle collection sinking table of the three-post insulator end insert, the surface discharge risk is reduced, the device recovers to a pre-compressed state under the resilience force effect of the spring during disassembly, assembly scattering or bouncing is avoided, and safe and convenient operation is ensured.

The invention relates to the technical field of voltage measurement, in particular to a sleeve flange position external insulation discharge measurement and analysis method. The method comprises the following steps: firstly, constructing an external insulation discharge measuring device at the position of a sleeve flange, secondly, reconstructing and calculating the voltage of the sleeve through the current of a sleeve end screen measured by a coil in combination with a measurement result of a penicillin bridge, and then, establishing an electric field numerical model according to an electromagnetic field theory when the sleeve end screen is partially discharged or the flange is discharged along a surface, and calculating the charge induced voltage; finally, the corona discharge condition can be analyzed according to the charge induced voltage, and the problem that the safety risk exists when the equipment voltage is directly connected or measured in a close range through a CVT method and the like is solved.

The utility model relates to the technical field of electric spark machining, and provides an electrode which comprises a base and an electrode block, the electrode block comprises a connecting portion detachably connected with the base and a working portion used for discharging, the working portion comprises an inner concave side face and a working plane making contact with a workpiece, and the electrode block and the base are arranged in a separated mode. The working part which is prone to loss can be replaced independently, the base can be used repeatedly, consumption of electrode materials is reduced, the side face perpendicular to the working plane is turned to be in an inward concave shape, the distance between the side face of the working part and the side wall of a workpiece cavity hole is increased, discharging of the side face of the working part is avoided, and the phenomenon of electric spark erosion is reduced. And the machining precision is improved.

This invention provides a non-contact device and method for assessing the surface characteristics of insulating materials, comprising: a housing, an equalizing element, and a ground electrode; the housing contains insulating oil to simulate the internal operating environment of power equipment; the equalizing element and the ground electrode are immersed in the insulating oil and are arranged vertically opposite each other, forming a surface discharge region between them; the equalizing element has a cavity containing a high-voltage lead, the lower end of which has a hanging part for suspending the insulating sample to be tested, such that the main body of the insulating sample is located on the central axis between the equalizing element and the ground electrode, and the lower end of the insulating sample is in contact with the ground electrode. This invention enables the surface discharge to develop stably along the surface of the insulating sample, effectively suppressing preferential breakdown of oil gaps, thereby simulating low surface field strength conditions under high voltage conditions, accurately and reliably reflecting the surface discharge characteristics of the insulating sample, and significantly improving the authenticity and repeatability of the test results.

The invention relates to a strain insulator string for a 1000kV extra-high voltage transformer substation suitable for a high altitude, and belongs to the technical field of insulator strings. Comprising an insulator assembly. The high-voltage side connecting fitting assembly is arranged at the lower end of the insulator assembly and is used for connecting a high-voltage wire; the grading ring is arranged at the joint of the lower end of the insulator assembly and the high-voltage side connecting fitting assembly, the grading ring is of a double-ring structure formed by coaxially arranging a large ring and a small ring, and the grading ring is located below the insulator assembly; and the shielding ring assembly is arranged below the grading ring and is connected to the high-voltage side connection fitting assembly, and the shielding ring assembly comprises two shielding rings which are symmetrically arranged on the two sides of the high-voltage side connection fitting assembly. The air gap discharge performance and the creeping discharge performance near the connection point are improved, the influence that the corona inception voltage is reduced due to elevation rise is counteracted, and therefore corona and noise are avoided.

The invention discloses a multi-mode intelligent plasma activated water device and method, and belongs to the technical field of plasma activated water preparation. The equipment comprises an air supply unit, a plasma generation unit, a gas-liquid mass transfer unit and an intelligent control unit, the plasma generation unit comprises a plurality of surface dielectric barrier discharge plates which are arranged in parallel; and the intelligent control unit is configured to be switched to operate in two working states of a low-power ozone mode and a high-power nitrogen oxide mode. In the low-power ozone mode, the discharge plates alternately supply power and automatically switch when detecting that the temperature reaches a preset threshold value; and in a high-power nitrogen oxide mode, the discharge plate synchronously and continuously works. The multi-purpose machine is achieved through mode switching, overheating is effectively prevented and the service life is prolonged through alternate power supply in a low-power mode, efficient treatment is achieved in a high-power mode, the differentiated requirements of different scenes for activated water components are met, and the multi-purpose machine has the advantages of being flexible in operation, high in stability and high in intelligent degree.

According to the insulation protection device of the antenna feed tube current inductor, the upper small corrugated section, the middle smooth section and the lower large corrugated section are arranged on the insulation sleeve, the smooth surface of the upper corrugated section and the smooth surface of the lower large corrugated section are changed into the surfaces of the wave structures, the surface flashover length of the insulation sleeve is increased, and when the discharge distances are the same, the flashover length of the insulation sleeve is increased; the surface flashover voltage is lower than the breakdown voltage of a pure air gap, air breakdown does not occur firstly between the inner walls of the wave surfaces, surface flashover occurs on the inner edges of the wave surfaces, and the surface flashover voltage of the insulation sleeve can be remarkably increased by increasing the surface discharge length of the surface of the insulation sleeve; and the lower large corrugated section can also overcome the electric field distortion and point discharge danger caused by the electric field intensity generated after the electric part at the bottom of the base is electrified. And the middle smooth section and the current inductor are arranged at intervals, so that the voltage monitoring performance is improved, the surface of the insulating sleeve is convenient to clean, and the problem of pollution discharge caused by long-time use is solved.

The invention relates to the technical field of high voltage and insulation, and discloses a ceramic composite silicone rubber composition, an insulator, a material and a preparation method thereof. The composition contains high-temperature vulcanized silicone rubber, calcined kaolin, modified glass powder, melamine polyphosphate, platinum-containing kaolin, a vulcanizing agent and a structure control agent. The ceramic composite silicone rubber material and the ceramic composite combined insulator provided by the invention have excellent ceramic performance, low water content and anti-creepage tracking capability, can operate in areas with serious creepage discharge such as re-icing, dirt and the like, and improve the operation safety and reliability of a power transmission line.