43 results about "Surface discharge" patented technology

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 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 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 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.

The application discloses a kind of plasma sterilization and deodorization device and control method thereof, it is related to low-temperature plasma application technical field.A kind of plasma sterilization and deodorization device, comprising: fan guide flow circulation module, fan guide flow circulation module has interface module, discharge module, decomposition module in turn sealed series along gas flow direction, discharge module includes insulating layer, the outer surface of insulating layer is provided with the discharge electrode layer formed by the winding of conductive wire, and the inside is attached with the rod-shaped conductive electrode.Installing is discharged when discharge module, insulating layer is attached with conductive electrode, so that discharge form is medium resistance discharge surface discharge, replaces traditional needle discharge form, avoids needle-shaped electrode condensate aggregation short-circuit problem, by adjusting the winding length of conductive wire cooperates voltage regulation, from source control the ozone amount generated by discharge, realize the controllable generation of low concentration of ozone, after further reducing ozone concentration after the catalyst decomposition of decomposition module, improve safety.

The application discloses a sintering aid-free silicon carbide ceramic room-temperature ultrafast field-induced sintering method and device. The method comprises the following steps: (1) placing a ceramic green body in a sealed vacuum box, and arranging electrodes at both ends of the ceramic green body and connecting the electrodes to an alternating current power supply; in the sealed vacuum box, the bottom of the ceramic green body is padded with an alumina plate, and an alumina plate is arranged above the ceramic green body; the alumina plates above and below are parallel and are supported by alumina blocks arranged at both sides of the ceramic green body; (2) adjusting the atmosphere in the sealed vacuum box to an inert atmosphere with a pressure of less than 1 atm; (3) turning on the power supply, increasing the voltage to a value at which surface discharge of the ceramic green body occurs, so that the electrical conductivity of the ceramic green body changes and an electric current channel is generated, continuously increasing the voltage to a predetermined value of the current density, then turning off the power supply, and obtaining the silicon carbide ceramic.

The invention discloses a lubricating material electric corrosion test and quantitative analyzer and an analysis method thereof, and relates to the technical field of electric corrosion experiments.The device comprises a needle point electrode, a lubricating oil pool, a displacement driving mechanism and a circuit module, and the needle point of the needle point electrode vertically faces a metal sample. The geometric characteristic that the curvature radius of the tip of the needle tip electrode is extremely small is utilized, the discharge phenomenon is highly localized in a micro area below the needle tip, accurate positioning of the discharge position is achieved, and the problem of random distribution of discharge points on the surface of a ball electrode is solved; the high-precision displacement driving mechanism is used for precisely regulating and maintaining the micron-order gap between the needle point electrode and the metal sample, and the circuit module is combined to apply the pulse voltage with precise and controllable parameters, so that the consistency of the discharge energy and the action range of each time is jointly ensured; therefore, a single electric corrosion pit with determined position and highly repeated geometrical morphology can be prepared on the surface of the metal sample, and the core problems of strong discharge randomness and low morphology repeatability are effectively solved.

This invention relates to the field of ultra-high voltage (UHV) power transmission equipment technology, specifically to an UHV dry-type terminal structure and its design method. The structure includes a conductor connection area, a composite sleeve area, a tailpipe stress relief area, and a lattice coordination area. The conductor connection area includes an upper component and a conductor connecting rod. The composite sleeve area includes a composite sleeve assembly. The tailpipe stress relief area includes a tailpipe and supporting insulators arranged around the tailpipe. The upper component, composite sleeve assembly, and tailpipe are connected sequentially from top to bottom. The conductor connecting rod passes through the upper component, composite sleeve assembly, and tailpipe sequentially along the axial direction. The lattice coordination area includes a lattice component for enhanced heat dissipation, which is fitted around the bottom periphery of the composite sleeve assembly and / or the tailpipe. This invention enhances heat dissipation by adding a lattice component to the bottom of the composite sleeve assembly and / or the tailpipe. This not only makes the heat dissipation path more efficient and greatly increases the heat dissipation area, thereby improving heat dissipation efficiency and allowing heat to dissipate rapidly, but also effectively eliminates the problem of uneven electric field caused by differences in shell curvature, reducing the risk of electro-erosion and surface discharge, and ensuring electrical safety during long-term equipment operation.

An electrostatic chuck assembly is provided that, while equipped with a gas passage plug, is less prone to surface discharge at the interface between the gas passage plug and the ceramic plate. This electrostatic chuck assembly comprises a ceramic plate having an upper surface on which a wafer is placed and a lower surface opposite the upper surface, and incorporating internal electrodes which are ESC electrodes and / or RF electrodes; a cooling plate attached to the lower surface of the ceramic plate; a plug placement hole penetrating the ceramic plate from the lower surface to the upper surface; a gas passage plug press-fitted into the plug placement hole and configured to allow gas to pass through its interior; and a gas introduction passage provided in the cooling plate and communicating with the plug placement hole. At least one side surface of the gas passage plug and the plug placement hole is made of a low SEEC material having a secondary electron emission coefficient (SEEC) of 5.0 or less.

This invention provides an interlayer insulation-reinforced magnetic ring and its manufacturing method. The magnetic ring includes a magnetic core wound from an amorphous or nanocrystalline material. The amorphous or nanocrystalline material is composed of multiple layers of tape, with the edges of adjacent layers staggered axially, thus forming serrated or stepped grooves on the end face of the wound magnetic core. The grooves are filled with insulating adhesive. One or both sides of the tape are coated with a micron-level insulating layer to separate adjacent layers. This invention replaces the traditional PI film by coating the tape surface with an insulating layer, eliminating the thickness occupation of the PI film, improving the duty cycle of the magnetic ring, and achieving high winding efficiency and low manufacturing cost. Furthermore, the serrated or stepped grooves formed on the end face of the magnetic core increase the creepage distance, blocking and disrupting the surface discharge path, effectively suppressing the end face discharge phenomenon. Combined with the insulating adhesive filling, mechanical protection is formed, preventing end face damage.

The utility model discloses an automatic cleaning device of ore drawing equipment, which belongs to the technical field of cleaning of the ore drawing equipment and is characterized in that a mounting frame is mounted at the upper end of a support frame, a material box is erected and mounted on the mounting frame, a storage bin is arranged at the upper end of the material box, a gate is mounted at the lower part of the front end of the material box, and the discharge of ores on a conveying belt is controlled through the gate; a bin wall vibrator is installed at the front end of the material box, a slope discharging plate is installed in the material box, and a discharging opening is formed in a lower end opening of the slope discharging plate. The cleaning brush effectively removes residues on the conveying belt, ensures that the conveying belt is clean, and reduces abrasion and faults of equipment. Cleaning efficiency is improved, and maintenance cost is reduced. And the discharging mechanism accurately controls discharging, and the ore treatment efficiency and quality are improved. And blockage and material accumulation are reduced through the design of the inclined-plane discharging plate and the chip removal holes. The bin wall vibrator assists ore rolling through vibration, the cleaning effect is enhanced, and the influence of dust on equipment and the environment is reduced.

The invention discloses a distribution network insulator unmanned aerial vehicle live-line spraying operation method, relates to the technical field of spraying operation, and aims to solve the problem that the existing live-line spraying technology lacks core technical support. The method comprises the following steps: detecting discharge points on the surface of an insulator; constructing an insulator three-dimensional model based on visual identification and GIS data, generating a spiral and latticed spraying path to optimize obstacle avoidance, and setting a key spraying section at an effective discharge point; and charged spraying is carried out by compensating the attitude deviation of the unmanned aerial vehicle. The invention further discloses a distribution network insulator unmanned aerial vehicle electrified spraying operation device, electronic equipment and a computer storage medium. The steps of detection, planning and spraying are integrated, and the high risk of traditional manual hot-line work and the terrain limitation of mechanical arm work are avoided.

The application provides a dual-mode solid working substance micro electrothermal thruster device, which comprises an anode nozzle, a capillary cavity, a trigger electrode and a cathode base; the trigger electrode and the cathode base have a gap therebetween, and the gap constitutes a trigger surface, which is used for generating initial plasma through surface discharge and inducing main gap discharge in the capillary cavity to generate plasma; after the main gap discharge is formed, different voltage forms are applied to make the solid working substance discharge loop of the capillary cavity conductive, so that the plasma continuously moves to the anode nozzle to generate thrust through external ejection. The dual-mode solid working substance micro electrothermal thruster provided by the application can realize two working mode outputs of “large thrust and low specific impulse” and “high specific impulse and small thrust”, has the advantages of simple structure, low mass, low system power consumption, high working substance utilization rate and wide output parameter range, and is suitable for more application scenarios.

The application relates to an electric pulse breaking reactor and a solid material breaking processing system. The inside of a reactor body is formed into a reaction chamber. A pressurizing valve is arranged on the outer wall of the reactor body. The pressurizing valve is communicated with the reaction chamber and is used for feeding high-pressure gas into the reaction chamber. A first high-pressure sleeve and a second high-pressure sleeve are respectively arranged on the reactor body. A first hollow electrode and a second hollow electrode are respectively arranged on the side wall of the reaction chamber. The first hollow electrode and the second hollow electrode are spaced to form a reaction channel. The reaction chamber is filled with high-pressure gas, and a discharge phenomenon is generated to form a high-pressure pulse electric spark. Since the high-pressure air can form an insulation effect, the direct air breakdown and the surface discharge phenomenon are inhibited, the generated high-pressure pulse electric spark can effectively break the solid material in the reaction channel, and a good material breaking effect is obtained.

The utility model relates to transformer technical field discloses a kind of transformer framework, including the framework main body installed in transformer interior, the framework main body both sides are equipped with several needle foot seat, and wire groove is equipped between adjacent needle foot seat;Wherein right side needle foot seat is fixed with first needle foot, wherein left side needle foot seat is fixed with second needle foot;Framework main body top is fixed with first baffle and second baffle respectively, first protruding block, second protruding block, groove and third protruding block for prolonging creeping path to increase creeping distance are set in the side of framework main body, in the process of transformer operation, it can prevent the phenomenon of surface discharge along due to the too short creeping distance between different potential components in high voltage or humid and other harsh environments, leading to insulation failure, effectively improve the insulation performance and safety of transformer, without increasing the length of framework main body, improve insulation performance in limited space, beneficial to the miniaturization of transformer.

The utility model discloses a solid-sealed polar pole structure suitable for a high-altitude wind power circuit breaker, particularly relates to the technical field of wind power circuit breakers, and comprises a first insulating shell, the outer surface of the first insulating shell is provided with a first umbrella skirt edge, one end part of the first insulating shell is provided with a first end shell, and the end part of the first end shell is connected with a second end shell. The end part of the second end shell is connected with a second insulating shell, and the outer surface of the second insulating shell is provided with a second umbrella skirt edge. According to the utility model, the multi-layer staggered umbrella skirts are subjected to variable-angle design, that is, the inclination angles of the umbrella skirts are not completely the same, so that a creepage path can be more effectively prolonged, the electric field intensity can be dispersed in different directions, the risk of overhigh local electric field is reduced, and the edges of the umbrella skirts are subjected to zigzag treatment and are additionally provided with zigzag structures, so that the creepage path is more effectively prolonged. The surface discharge path can be further increased, the uniform distribution of the electric field is destroyed, and the surface discharge phenomenon is more effectively inhibited.

The invention relates to the technical field of plasma application, in particular to a plasma grain disinfecting and killing device based on creeping discharge. The device comprises a conveyor belt system, a high-voltage electrode, a grounding electrode, a nanosecond pulse power supply module, an electric control unit and a safety protection structure. High-voltage electrodes and grounding electrodes which are arranged in a staggered manner and embedded in a coplanar manner are arranged on the surface of the conveying belt to form a micro-slope electrode structure; under the excitation of high voltage, surface discharge plasma and gliding wind are generated, and the thrust of the ion wind is utilized to cooperate with the electrode layout, so that the seeds automatically roll in the conveying process, and multi-angle and all-directional plasma exposure and disinfection treatment are realized. The device solves the problems of uneven treatment, low efficiency, thermal damage or chemical residues and the like in the prior art, has the advantages of uniform treatment, environment friendliness, simplified structure, high adaptability and the like, and is particularly suitable for continuous online sterilization and preservation of grain seeds.

This invention relates to the field of signal reconstruction technology and discloses a method for reconstructing the current signal of a surge arrester after the protection circuit has operated. The method includes: performing operation interval location and transformation on the original sequence to obtain a standardized sequence and a set of effective points; performing equivalent recovery identification and waveform restoration of the protection circuit to obtain the residual current waveform; determining the time anchor point representing the switching of the current conduction mechanism in the cumulative charge and current correlation trajectory, and fusing the body recovery and surface discharge rate into a continuous decay model; reconstructing the missing waveform segments based on this model and boundary conditions; splicing the effective point set, reconstructed curve, and residual waveform and back-mapping them into a total sequence; inputting the total sequence into the equivalent model for forward simulation replay, and iteratively correcting based on the local minima of the residual to output the final current signal. This invention eliminates the distortion at the protection front end and objectively restores the surge arrester's conduction current throughout the entire process.

The invention discloses a simulation modeling method and device for a trigger breakdown process of a surface flashover type trigger vacuum switch, electronic equipment and a storage medium. The method comprises the following steps: determining a trigger condition of the surface flashover type trigger vacuum switch; according to the trigger condition, performing simulation calculation on the trigger breakdown process of the surface flashover type trigger vacuum switch to obtain the surface discharge characteristic of the surface flashover type trigger vacuum switch; according to the electron current density of the local surface of the anode, performing simulation calculation on the evaporation process of the local surface of the anode in the surface flashover type trigger vacuum switch to obtain the evaporation characteristic of the local surface of the anode under the action of the electron current; according to the evaporation characteristic and the density of the initial electrons diffused into the main gap, performing simulation calculation on the main gap breakdown process of the surface flashover type trigger vacuum switch so as to obtain an evolution rule of microscopic plasma parameters of the surface flashover type trigger vacuum switch; and multi-physics field coupling simulation of the trigger breakdown process of the surface flashover type trigger vacuum switch is realized.

The invention relates to a V-shaped suspension 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 a yoke plate assembly; the insulator string assembly is formed by arranging two strings of single-string insulators in a V shape; the shielding ring assemblies are connected to the yoke plate assembly and are arranged on the two sides of the lower connecting part of the insulator string; and the grading ring assembly is arranged above a lower connection point of the insulator string assembly, the grading ring assembly is of a saddle-shaped single-ring structure, and the saddle bending angle of the saddle-shaped single-ring structure is matched with the included angle of the V-shaped suspension insulator string. The electric field of the node accessory can be effectively adjusted, the performance of air gap discharge and surface discharge near the connection point is improved, the influence of corona inception voltage reduction due to elevation rise is counteracted, and therefore generation of corona and noise is avoided.