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1220 results about "Insulator strings" patented technology
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A suspension type string insulator consists of a number of porcelain discs connected in series through metallic links. Suspension insulators or string insulators are very widely used in electrical overhead transmission system. However, there is a significant thing to be considered in case of these string insulators, known as string efficiency.
Robot mechanism for cleaning and inspection of live-line insulators
ActiveUS20080301891A1Improve efficiencyImprove securityBowling gamesCarpet cleanersBall bearingMechanical engineering
A robot mechanism adopts a dry cleaning method to clean the surface of live-line insulators without: using water and can perform cleaning and inspection of the surface of the live-line insulators while automatically moving along an insulator string. The robot mechanism includes a main unit having upper and lower wing frames connected with each other by a connecting bracket to surround the insulator string, a cleaning unit disposed between the upper and lower wing frames and including a base frame to perform dry cleaning with a rotational brush and a CM guide, a lift unit including a clamp and a ball-bearing screw to move the main unit up or down, and an inspection unit to electrically inspect the insulators; and a coupling unit to couple a pair of the main units to allow the pair of main units to move along a tension insulator string or a suspension insulator string.
Owner:KOREA ELECTRIC POWER CORP
Robot mechanism for inspection of live-line suspension insulator string
ActiveUS20100100239A1Inspection is accurateProgramme controlVibration measurement in solidsControl theoryElectric wire
Disclosed herein is a robot mechanism for inspection of a live-line suspension insulator string. A robot body of the robot mechanism reciprocates along the live-line suspension insulator string and includes upper and lower robot frames configured to encircle the insulator string, a battery module provided to either end of the robot body, an actuation module for moving the robot body along the insulator string, an inspection module for electrically inspecting an insulator, a connection module for coupling the robot body to an installation / dismantlement mechanism, a wing opening / closing module for manually separating the robot body from the insulator string, a measurement module for measuring electrical properties of the insulator, a controller for controlling operation of the robot body, and a crack detection unit for detecting cracks formed in the insulator.
Owner:KOREA ELECTRIC POWER CORP
High-voltage line insulator detecting and sweeping robot
ActiveCN104128320AWith detection functioWith cleaning functionElectrical testingCleaning using toolsHigh pressureHigh voltage
The invention relates to a high-voltage line insulator detecting and sweeping robot which comprises three layers of supports, a plurality of clamping mechanisms, a climbing and telescopic mechanism, an electrified insulator detection device and an insulator sweeping mechanism. The clamping mechanisms, the electrified insulator detection device and the insulator sweeping mechanism are arranged on the supports and the supports are connected through the climbing and telescopic mechanism. The robot can climb along insulators and can automatically sweep and detect the insulators. The robot is compact in structure, the functions are comprehensive, climbing is stable, the robot can easily climb up insulator strings, at most three insulators are short-circuited, and the robot can be used for sweeping and detecting horizontal and suspending electrified insulator strings.
Owner:WUHAN UNIV
High-voltage power line tension insulator string forward spin live-wire altering method and two yoke plate device
ActiveCN101174761AAccurate placementLarge operating spaceSuspension/strain insulatorsApparatus for overhead lines/cablesBottleHigh pressure
The invention discloses a method and a two-connection board device for replacing tension insulator strings of high-voltage transmission lines with upspinning and charging. The insulator strings are loosened first by using special tools such as end wing clips and insulating pull plates; The pulleys and screw rods on the side make all the ends of the insulator strings disengage; finally, the pulleys on the ground wire brackets are used to rotate the porcelain bottle strings from the horizontal state to the vertical state, thus changing the complex operation into a relatively simple operation, which greatly shortens the time Potential working time to ensure the safe operation of the line; live replacement of the high-voltage transmission line tension insulator string double-connected plate device, including two wing cards and two screw screws, and also includes two pairs of insulating pull plates, one end of the two pairs of insulating pull plates They are respectively connected with two wings of the wing card, and the other ends are respectively connected with a lead screw, and the other ends of the two lead screws are respectively connected with the two wings of the other wing card. The structure is simple, easy to operate and low in cost.
Owner:MAINTENANCE BRANCH OF STATE GRID CHONGQING ELECTRIC POWER +1
Electric network thunderstorm damage distribution determination method
ActiveCN101261616ASolve the problem that it is impossible to clearly determine the distribution of lightning damage in the power gridSimple methodData processing applicationsMeasurement devicesLightning strikeStatistical analysis
Owner:WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST +1
Method for calculating thickness and weight of ice coating on overhead transmission line of tangent tower
InactiveCN101907456AReduce in quantitySimple structureWeighing apparatus for materials with special property/formIsolatorVertical plane
The invention discloses a method for calculating the thickness and the weight of ice coating on an overhead transmission line of a tangent tower. The method comprises the following steps of: 1, calculating basic mechanic parameters of a wire at ice coating temperature but without ice coating in a vertical plane according to the design parameters; 2, calculating height difference angle in a wind deviation plane, wire horizontal stress, wire deadweight ratio load in a vertical direction, horizontal span and wire length from the lowest point of a wire of big and small side towers to a main tower according to the wind deviation angle of an isolator string measured by a sensor; and 3, establishing a relation expression between the tilt angle of the isolator string in the wind deviation plane and the wind deviation angle of the isolator string in the wind deviation plane and the tilt angle of the isolator string in the vertical plane, and establishing an equation of load balance in the vertical direction after the ice coating in the wind deviation plane, and calculating the thickness and weight of equivalent ice coating of the wire. The method has the advantages of reducing the equipment quantity, and improving the calculation precision and the accuracy and the reliability of the calculation result.
Owner:SOUTH CHINA UNIV OF TECH +1
Different-voltage-class subsection arc-extinguishing anti-thunder gap device
ActiveCN103368075ANot affected by lightningImprove stabilitySpark gap detailsOvervoltage arrestors using spark gapsElectric power systemLow voltage
A different-voltage-class subsection arc-extinguishing anti-thunder gap device comprises an arc-extinguishing device and a protective gap device which is arranged nearby an insulator chain in parallel. The protective gap device is mainly composed of a low-voltage end electrode and a high-voltage end electrode; the arc-extinguishing device comprises an arc-extinguishing cylinder and an arc-extinguishing projectile storage bin I in a disc shape, wherein a trigger coil, a trigger electrode, a projectile trigger position, arc-extinguishing projectiles and a plane scroll spring are arranged inside the arc-extinguishing projectile storage bin I; one end of the trigger electrode is connected with the trigger coil, and the other end of the trigger electrode extends to the projectile trigger position and is connected with the arc-extinguishing projectiles; the plane scroll spring is arranged at the center of the arc-extinguishing projectile storage bin I; the arc-extinguishing projectiles are arranged in a projectile storage rail of the arc-extinguishing projectile storage bin I; one end of the low-voltage end electrode is arranged on a pole and tower cross arm through a connection hardware fitting, and the other end of the low-voltage end electrode is arranged in the trigger coil of the arc-extinguishing device; one end of the high-voltage end electrode is arranged on an overhead conductor, and the other end of the high-voltage end electrode points to the low-voltage end electrode. The different-voltage-class subsection arc-extinguishing anti-thunder gap device is easy to install and replace, long in service life, and capable of greatly improving stability of an electrical power system.
Owner:南宁超伏电气科技有限公司
10-35kv overhead transmission line constraint space injection gas arc extinguishing lightning protection gap apparatus
The invention relates to a lightning protection and especially relates to a 10-35kV overhead transmission line constraint space injection gas arc extinguishing lightning protection gap apparatus which is suitable for a 10-35kV overhead transmission line. The apparatus is installed in parallel on two ends of a line insulator string to protect a flash-over voltage between gaps to be less than the voltage of a protected insulator string so that the apparatus is punctured prior to the protected insulator string when the power transmission line is suffered from lightning stroke. During disruptive discharging, a signal acquisition device automatically senses a lightning current signal and triggers a high speed injection gas generation apparatus. A high speed injection air flow is instantly generated so as to carry out great impact on a follow current arc in a constraint space along a vertical direction, and carry out cooling till the arc is quenched. According to the invention, a structure is simple, installation and maintenance are convenient. Through using the apparatus of the invention, when the line is suffered from the lightning stroke, a lightning current can be rapidly led to the ground and simultaneously a high speed airflow quenching power frequency follow current is generated so that electric equipment can be effectively protected and power supply reliability is increased.
Owner:云南电力试验研究院(集团)有限公司
Power transmission line wind tunnel test system and method applied to typhoon field
The invention discloses a power transmission line wind tunnel test system and method applied to a typhoon field. The typhoon field is used as a test wind field. The test system consists of a test tower made according to a discrete stiffness method, two tangent towers serving as far-end supports, two strain towers, six four-span four-bundle conductors, two four-span ground wires and 18 insulator chains. The test is carried out respectively at three wind angles of 90 degrees, 75 degrees and 60 degrees. Through an aeroelastic model multi-angle wind tunnel test, the displacement and the acceleration response of the test tower under the conditions of different wind speeds and different wind angles in the typhoon field can be tested, the gust response coefficient of a concerned part can be calculated, and the characteristics of wind-induced response of the power transmission line in the typhoon field are analyzed through comparison with those in a well-conditioned wind field.
Owner:ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
Multi-gap self-swelling strong-air-current longitudinal blow-out arc anti-thunder protecting device
ActiveCN103594210AImprove arc extinguishing effectHigh vulnerabilityInsulatorsCorona dischargeElectricityElectric power system
The invention discloses a multi-gap self-swelling strong-air-current longitudinal blow-out arc anti-thunder protecting device which comprises a longitudinal blow-out arc device arranged at an insulator string earthing terminal through a grounding side connecting hardware fitting, a grounding side electrode arranged on the longitudinal blow-out arc device, and a guide line side electrode arranged on an off-contact guide line. A protecting gap formed by the grounding side electrode and the guide line side electrode is parallel to an insulator string. The longitudinal blow-out arc device comprises an arc extinguishing device body and arc extinguishing tubes. The arc extinguishing device body is provided with a plurality of through holes for placing the arc extinguishing tubes. An angle formed by two arc extinguishing tubes which are arranged in the arc extinguishing device body is 90 degrees, and end portions of the two arc extinguishing tubes are in contact with each other. Each arc extinguishing tube is in a spiral shape. The grounding side electrode is connected with a first arc extinguishing tube through a guide line, and the grounding side connecting hardware fitting is connected with a last arc extinguishing tube through a guide line. The device is simple in structure, low in manufacture cost, safe and reliable, effectively reduces the power system transmission line thunderstrike tripping rate and the accident rate, and improves the stability of a power system.
Owner:王巨丰 +1
Insulator chain intelligent detection robotic system
ActiveCN103091579AImprove operational adaptabilityElectrical measurement instrument detailsElectrical testingInformation processingRobotic systems
The invention discloses an insulator string intelligent detection robotic system which is used for detection of level tension twin insulator strings. The insulator string intelligent detection robotic system comprises a robot motion system and an information processing system. The robot motion system comprises a mechanism connecting plate, a climbing device, a guide device, detection equipment, a control unit and a man-machine control terminal, wherein the guide device guides the insulator strings, is placed on two sides of the proceeding direction of the mechanism connecting plate and is matched with the twin insulator strings to be detected, the detection equipment is placed on the mechanism connecting plate, the control unit outputs a drive device connected with the climbing device to control the angle deviation between a front set of climbing arms and a rear set of climbing arms, and the man-machine control terminal is communicated with the control unit through a wireless communication unit to remotely control the climbing device. The insulator string intelligent detection robotic system is compact in structure and fast in movement speed.
Owner:STATE GRID INTELLIGENCE TECH CO LTD
Porcelain suspension type insulator fault diagnosis method
ActiveCN103792238AExclude temperature signature effectsImprove accuracyOptically investigating flaws/contaminationPyrometry using electric radation detectorsComputer scienceInfrared thermal imaging
The invention relates to a porcelain suspension type insulator fault diagnosis method. The method can realize the diagnosis of a faulty insulator by analyzing the temperature feature information of a porcelain suspension type insulator string. When the method is used for implementing diagnosis, the infrared thermal image spectrum of a certain number of the same types of insulator strings having no obvious abnormality can be collected on a to-be-detected site, so as to form the reference temperature feature information of the type insulator string of the detection site. Then the temperature feature information in the infrared thermal imaging spectrum of the to-be-diagnosed insulator string is extracted to compare with the reference temperature feature information, and the faulty insulator can be judged when no obvious difference exists. According to the porcelain suspension type insulator fault diagnosis method, the influence of the environment interference factor on the temperature feature of the insulator string can be eliminated, and the insulator fault diagnosis accuracy of the infrared thermal imaging method can be effectively improved. The porcelain suspension type insulator fault diagnosis method considers the difference of temperature feature difference of insulators at different positions, can realize diagnosis by comparing the temperature features of the same position of the similar equipment in the identical environment, and is applicable to the insulator fault diagnosis under various complicated conditions. The porcelain suspension type insulator fault diagnosis method can be conveniently applied on site.
Owner:STATE GRID CORP OF CHINA +2
High-voltage power line tension insulator string forward spin live-wire altering method
ActiveCN101174761BAccurate placementLarge operating spaceSuspension/strain insulatorsApparatus for overhead lines/cablesEngineeringTraveling block
The present invention discloses a spinning electricity replacing method and a double yoke-plate device of high-tension transmission line strain insulator. A wing-shaped card and an insulation drawplate and other special tools on the end are used to firstly loose the stain insulator; a pulley block and a lead screw on the sides of a cross arm and a lead wire are used to complete break away the twoends of the strain insulator; finally the pulley block arranged on a ground bracket is used to rotate a porcelain insulator from a horizontal state to a vertical state, thus changing the complicated operation to the simple operation, greatly shortening the equipotential operation time and ensuring the safe operation of the line. The double yoke-plate device of high-tension transmission line strain insulator includes two wing-shaped cards and two lead screws as well as two insulation drawplates; one end of the two insulation drawplates is respectively connected with the two wings of the two wings of the wing-shaped card and the other end is respectively connected with the lead screw; the other end of the two lead screws is respectively connected with the two wings of the other wing-shaped card. The present invention has the advantages of simple structure, easy operation and low cost.
Owner:MAINTENANCE BRANCH OF STATE GRID CHONGQING ELECTRIC POWER +1
Intelligent detection method and detection system device for contaminated insulator
InactiveCN102645618ASimple structureEasy to operateTesting dielectric strengthTest powerEconomic benefits
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.
Owner:HANGZHOU YONGKONG TECH
Insulator sweeping and detecting robot for high-voltage power transmission line
ActiveCN105855200AImprove practicalityCompact structureCleaning using toolsApparatus for overhead lines/cablesLocking mechanismElectric machine
The invention discloses an insulator sweeping and detecting robot for a high-voltage power transmission line. The robot comprises an annular frame and a control box; the annular frame is capable of being opened towards the two sides around a rotating shaft and comprises an upper layer bracket, a lower layer bracket and a middle layer bracket, wherein the upper layer bracket and the lower layer bracket are fixedly connected through a plurality of auxiliary brackets; the middle layer bracket is capable of moving up and down through a sweeping layer elevating mechanism; the upper layer bracket is provided with an upper clamping jaw for clamping an insulator; a detecting device is arranged on the upper clamping jaw; the middle layer bracket is provided with a sweeping device and an auxiliary clamping jaw which is used for clamping the skirt section of the insulator; a lower clamping jaw capable of moving up and down through a clamping jaw layer elevating mechanism is also arranged between the upper layer bracket and the lower layer bracket; the annular frame opposite to the rotating shaft is provided with a locking mechanism for locking the closed state of the annular frame; a power supply and a controller which is used for controlling the running and action sequence of a rotating mechanism and a servo motor are arranged inside the control box. The insulator sweeping and detecting robot disclosed by the invention is compact in structure, good in adaptablity, complete in sweeping, high in load capacity and applicable to hot-line sweeping and detection of horizontal and suspension insulator strings.
Owner:WUHAN UNIV
Method and system for determining serial and parallel connection gaps of overhead power transmission line insulators
ActiveCN101714748AReduce accident rateParallel clearance preventionOverhead installationInstallation of lighting conductorsFailure rateUltimate tensile strength
The invention discloses a method and a system for determining serial and parallel connection gaps of overhead power transmission line insulators, wherein the method comprises the following steps of: determining the structures and the shapes of parallel connection gaps according to thunder impulse discharge characteristics; determining the structures and the shapes of the parallel connection gaps according to electric-field intensity distribution; determining the structures and the shapes of the parallel connection gaps according to power frequency arc motion characteristics; determining the space magnetic-field distribution of the parallel connection gaps according to the structures and the shapes of the parallel connection gaps; building an arc motion model of the parallel connection gaps by adopting an arc segmented model to simulate the motion processes of arc roots and arc columns of power frequency arcs under the actions of a space magnetic field and wind force; emulating the arc motion characteristics generated by various different structures and shapes of the connection parallel gaps by utilizing the arc motion model; and determining the structures and the shapes of the parallel connection gaps according to the influences of various different structures and shapes of the parallel connection gaps on the arc motion processes. The parallel connection gaps take account of both the advantages and the defects between the lightning outage rate of a line and the failure rate of the line.
Owner:CHINA ELECTRIC POWER RES INST +1
Method for safe region evaluation of filthy degree of electric transmission line insulator
ActiveCN104090218AAccurate assessmentVisual assessmentTesting dielectric strengthStructural typeVoltage
The invention discloses a method for safe region evaluation of the filthy degree of an electric transmission line insulator. At present, most electric transmission line operation and maintenance units directly adopt an equivalent salt deposit density comparison method which has certain limitations. According to the method for safe region evaluation of the filthy degree of the electric transmission line insulator, through statistics and analysis of the distribution rule of dust density / equivalent salt deposit density ratios of the hot-line work insulator, the quantization relationship between the flashover voltage and the equivalent salt deposit density and dust density of the surface of the hot-line work insulator is obtained through experimental investigation; factors such as flashover voltage with 50% flashover probability, insulator serial type and the highest operation voltage of a transmission line are considered comprehensively, a safe region graph of the filthy degree of the electric transmission line insulator is drawn, and then the safety regions of various filthy degrees are obtained; the influence of the equivalent salt deposit density and dust density of the surface of the insulator are considered comprehensively, the structural type difference of insulators is considered, and therefore safe region evaluation of the filthy degree of the electric transmission line insulator can be achieved more accurately and visually.
Owner:STATE GRID CORP OF CHINA +1
On-line detection method for AC power transmission line porcelain zero resistance insulator based on infrared thermal imaging
ActiveCN101487866AReduce workloadReduce pollution flashover accidentsImage analysisElectrical testingElectric power transmissionAlternating current
The invention relates to an on-line detection method for ceramic zero resistance insulators on an alternating current transmission line based on infrared thermal imaging, and belongs to the field of power transmission. The invention aims to provide an on-line detection method for ceramic zero resistance insulators with safety, economy, high efficiency and high accuracy. The invention adopts the technical proposal that when a ceramic insulator string has a zero resistance insulator, the spread voltage of other insulators is boosted, the reactance of the whole insulator string is reduced, the leakage current of the insulator string is increased, and the heating difference of the good insulators and the zero resistance insulators is increased. By shooting thermal field images of the insulator string through a high-precision infrared imaging instrument, adopting image processing technology to extract axial temperature distribution curves of the insulator string, and utilizing the difference of the axial temperature distribution curves of the adjacent insulators, the method achieves accurate judgment of the state of the insulators. The method can be used for zero resistance detection for the ceramic insulators on the alternating current transmission line in grade of 110KV and above voltage, and is applied to lightening workload of detection greatly and improving secure operation level of a power system.
Owner:湖南湖大华龙电气与信息技术有限公司
Robot for electrified detection insulator string
ActiveCN102608474AReduce wearGood continuity of motionElectrical measurement instrument detailsElectrical testingElectricityElectric machine
The invention discloses a robot for electrified detection of an insulator string. The robot comprises a plurality of guide rod mechanisms, at least one insulator detection device, a control device and at least one rotary driving device, wherein the guide rod mechanisms are connected on the two sides of the rotary driving device, the control device and the insulator detection device are all fixed on the guide rod mechanisms, and the insulator detection device and a driving motor of the rotary driving device are all electrically connected with the control device. According to the robot, the structure is compact, the movement speed is quick, the number of short-circuit insulator sheets is few, the abrasion on the insulators is little, the safety protection is good, the using range is wide, and the robot is suitable for duplex-parallel insulator strings, single strain insulator strings, suspension insulator strings and V-shaped insulator strings.
Owner:STATE GRID INTELLIGENCE TECH CO LTD
Insulator string intelligent detection robot system and control method thereof
ActiveCN103158154AReduced climbing diameterImprove adaptabilityElectrical testingManipulatorElectricityControl system
The invention discloses an insulator string intelligent detection robot system which comprises two groups of drive mechanisms which are symmetrically arranged, the opposite sides of the two drive mechanisms are connected in a hinged mode through a holding mechanism, the other opposite sides of the two drive mechanisms are respectively and fixedly provided with a guide arm through clamping blocks, an insulator detector is installed on the holding mechanism, one of the clamping block is provided with an electronic control box, and a control system which is electrically connected with the drive mechanisms, the holding mechanism and the insulator detector is arranged in the electronic control box. The invention further discloses a control method of the insulator string intelligent detection robot. According to the control method of the insulator string intelligent detection robot, the robot is matched with the rise and fall of the drive mechanisms so that the lower surface of an insulator can be effectively detected, and the robot is led to be in a holding state with the insulator by means of an extensible structure controlled by a position close loop. Accurate and reliable walking of the robot can be guaranteed by means of biaxial drive crawling controlled by the differential speed. Accurate and reliable stopping in the process of the crawling can be guaranteed by a servo motor. Due to the fact that the contacting between the insulator string and the ground is less, the abrasion of coating of the porcelain skirt portion of the insulator is little, and the force of friction is small.
Owner:STATE GRID INTELLIGENCE TECH CO LTD
ZigBee-based system and method for monitoring wind drift of power transmission line on line
InactiveCN102141395AStraightforwardDirect monitoringAngle measurementBatteries circuit arrangementsGeneral Packet Radio ServiceEngineering
The invention discloses a ZigBee-based system for monitoring the wind drift of a power transmission line on line, which comprises a ZigBee wireless wind drift detector, a rod tower monitoring sub-machine, a general packet radio service (GPRS) communication module and a monitoring center, which are connected in turn, wherein the rod tower monitoring sub-machine and the GPRS communication module are connected with a power supply module respectively; and the rod tower monitoring sub-machine is connected with a wired wind drift detector. In a method using the system for monitoring, the actual wind drift condition of an insulator string of the power transmission line can be obtained accurately by acquiring the wind drift angles of the topmost and bottommost insulators of the insulator string of the power transmission line in real time or fixed time and by quantitative calculation and qualitative analysis, and thus, the most direct and efficient monitoring of the wind drift of the insulator string of the power transmission line is realized.
Owner:XI'AN POLYTECHNIC UNIVERSITY
Live line replacing method high voltage transmission line strain insulator-string and device
ActiveCN101022212AReduce volumeEasy to carryOverhead installationSuspension/strain insulatorsHigh tension leadsHigh pressure
This invention relates to a method for exchanging tension-proof insulator strands used in high voltage transmission lines and a devie, which installs a front and a back clamp for anchoring and stringing leads and a connection clamp of an anchor line at two places of connecting metals of a lead end and a horizontal end constituting a vertical pulley set for stringing the insulator strand and the connecting metal at both sides between the strand and the connecting metal, strings the pulley set synchronously and slowly to string one-side two high voltage leads, then to string the anchor line and the anchor lead, at the same time, removes the connection of the insulation strand and the connecting metal, relaxes the pulley set slowly to transfer the lead tension to the anchor line completely, therefore, when the lead is anchored, the original tensioned insulation strand is relaxed to a vertically hanging one for exchange, and the tighten, anchor of the lead and separation of the the insulator strand and the metal are finished at one run.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO +2
Multi-interspace self-expanding strong-airflow arc extinguishing lightning protection device
The invention relates to a lightning protection device and especially relates to a multi-interspace self-expanding strong-airflow arc extinguishing lightning protection device used in power transmission lines with different voltage grades. The device is installed in parallel on one side of a line insulator substring. Insulation strength of a main discharge protection gap and an auxiliary discharge gap is less than the insulation strength of the protected insulator substring so that an overvoltage generated when lightning stroke is generated on the line punctures the protection gap preferentially. When the protection gap is punctured so as to discharge, high temperature arc is generated in the auxiliary discharge gap, air is rapidly heated and expanded in a semi-closed space of the auxiliary discharge gap so that the arc is elongated and is erupted along a gas guidance hole. Simultaneously, a signal acquisition device automatically collects signals and starts a gas generation apparatusso as to instantly generate high speed airflow to extinguish the arc. The protection device of the invention has a simple structure. Installation is convenient. When the lightning stroke is generatedon the line, the lightning current can be rapidly leaked to the ground and simultaneously the high speed airflow is generated to extinguish the arc. Therefore, electric power equipment can be effectively protected and power supply reliability can be increased.
Owner:GUANGXI POWER GRID CO LTD NANNING POWER SUPPLY BUREAU
Insulator capable of improving external insulation electric strength
An insulator which can improve the electrical strength of external insulation relates to a line, a pillar and a bushing insulator with high electrical strength. An upper barrier and a lower barrier are arranged on an upper electrode and a lower electrode of the insulator, a middle barrier is arranged at the outside of an cascading electrode of the insulator string, an upper ring barrier and a lower ring barrier are externally arranged on an upper equalizing ring and a lower equalizing ring of the insulator, and an iron tower barrier and a transmission line barrier are arranged nearby an iron tower and a transmission line close to the insulator. The invention arranges one or multiple barriers, which can improve the strength of external insulation of the insulator, between the two electrodes of the insulator, changes the double-element structure of traditional insulators into a three-element structure, namely consisting of three parts of electrodes, insulators and barriers. The barrier stops moving charge entering from an area to another area, thus easing the area with electrical field distribution in a tense state, obviously enhancing the initial corona voltage and flashover voltage of the insulator, reducing radio interference and the power consumption of high-voltage transmission lines and relieving the deterioration of the insulator.
Owner:HUBEI XINDESAI INSULATION TECH
Gas injection type parallel gap device
InactiveCN103730834APrevent trippingEffective protectionSpark gap detailsInsulatorsTransformerElectric power system
The invention discloses a gas injection type parallel gap device. The protection device belongs to the field of lightening protection gap for power transmission lines of alternating-current and direct-current electric power systems. The device is connected with the two ends of a power transmission line insulator chain in parallel, under a lightening stroke, the device is broken down before the insulator chain can be broken down, and thus the insulator chain and the corresponding power transmission line can be protected; moreover, a high-speed high-voltage gas flow can be generated fast and acts on arcs to restrain formation and development of the arcs, the arcs are extinguished in a transient state, and thus the lightning trip-out rate and the lightening accident rate of an electric power system are reduced. The gas injection type parallel gap device comprises arc-control devices on the grounding side and the wire side, fixing devices and parallel spiral fittings installed at the two ends of the insulator train of the line. The arc-control device on the grounding side and the arc-control device on the wire side respectively comprise an arc extinguishing powder storage chamber, an arc air-termination ring, an insulating gas generation chamber, an arc spray channel and the like. With the device, the stability of the electric power system is improved, the on-load action frequency of a breaker is effectively reduced, the service life of electric power equipment such as a transformer is prolonged, and production, operation and maintenance cost is very low.
Owner:闫仁宝 +1
Zero resistance insulator detection method on basis of finite element database
ActiveCN102955088ATesting dielectric strengthSpecial data processing applicationsFinite element analysis softwareFinite element analyse
The invention relates to a zero resistance insulator detection method on the basis of a finite element database, which comprises the following steps of: by utilizing finite element analysis software, establishing a model database of a typical power transmission line tower and a corresponding insulator string; and carrying out electric field analysis on an insulator string model in the model database by the finite element analysis software, adopting a non-contact electric field test method when carrying out field testing on a zero resistance insulator, comparing a field test result with a finite element calculating result and effectively identifying whether the zero resistance insulator exists in the line insulator string and a specific position thereof. According to the invention, the zero resistance insulator detection method is on the basis of the finite element emulation calculation; the electric field distribution conditions of various towers and insulator strings can be mastered; part of test work is replaced with calculation; and the workload is lower. Meanwhile, the non-contact electric field test method can be used as the zero resistance insulator detection method; the specific position of the zero resistance insulator can be identified; and the zero resistance insulator detection method has the advantages that workers do not need to climb the tower to work, power does not need to be switched off to carry out detection, the zero resistance insulator detection method is safe and reliable and the like.
Owner:YUN NAN ELECTRIC TEST & RES INST GRP CO LTD ELECTRIC INST +1
Method for replacing insulator chains in 220 kV long-span high tower in live working
ActiveCN103227431AReliable engagementGuaranteed reliabilityApparatus for overhead lines/cablesArcing hornsEngineering
The invention relates to an operating tool for replacing insulator chains in live working, particularly to a method for replacing insulator chains in a 220 kV long-span high tower in live working. The key point is that the technology bias is overcome in a way that arcing horns and grading rings on a yoke plate for connecting the insulator chains are temporarily dismantled on a cross arm of the 220 kV long-span high tower to reserve screw holes for connecting fixtures on the yoke plate; the upper fixture and the lower fixture are connected with the yoke plate to lift the insulator chains, and the stress borne by the entire tool is half of that in the prior art, so that bearing and operation on the big-load insulator chains can be realized; and an equipotential electrician is borne by a chairlift to enter and go out of the electric field at the cross arm, so that the safety and controllability are stronger, the operating method is simple, the operating tool can be directly obtained from the existing tools, time and labor saving as well as economy are realized, and the replacement of the insulator chains on a steel pipe pole high tower comes true.
Owner:STATE GRID CORP OF CHINA +2
Tube busbar suspension fitting for converter station valve hall
ActiveCN103296623ASuspension implementationMeet suspension needsBus-bar installationBusbarEngineering
The invention discloses a tube busbar suspension fitting for a converter station valve hall. The tube busbar suspension fitting comprises an anti-corona ball and a hanging rack which is fixedly arranged on the inner sphere of the anti-corona ball and which is used for suspending a tube busbar. The hanging rack comprises a hanging rod which penetrates the top of the anti-corona ball and which is used for connecting to insulator strings on the top of the valve hall. An adjustable connecting rack with longitudinally adjustable length is hinged to the lower end portion of the hanging rod, and supporting claws distributed along circumstance of the anti-corona ball evenly are connected between the adjustable connecting rack and the anti-corona ball. A tube busbar clamp for matching with the tube busbar in a hoop manner is hinged to the bottom of the adjustable connecting rack. A single tube busbar is clamped through the tube busbar clamp to realize suspension of the single tube busbar in the valve hall, the need of suspending the single tube busbar can be met, and the tube busbar suspension fitting has the advantages of convenience and rapidness in mounting; furthermore, the length of the adjustable connecting rack can be adjusted longitudinally, accordingly the length of the tube busbar clamp in the valve hall can be adjusted directly, and the need of clamping tube busbars of different lengths through the tube busbar clamp can be met.
Owner:STATE GRID CORP OF CHINA +1
Configuration method of high-voltage transmission line insulator
InactiveCN101540487ASatisfy the requirements of pollution external insulation designMeet the design requirementsSuspension/strain insulatorsApparatus for overhead lines/cablesElectric power systemEngineering
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.
Owner:ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
Robot mechanism for inspection of live-line suspension insulator string
ActiveUS8239064B2Inspection is accurateVibration measurement in solidsProgramme controlEngineeringControl theory
Disclosed herein is a robot mechanism for inspection of a live-line suspension insulator string. A robot body of the robot mechanism reciprocates along the live-line suspension insulator string and includes upper and lower robot frames configured to encircle the insulator string, a battery module provided to either end of the robot body, an actuation module for moving the robot body along the insulator string, an inspection module for electrically inspecting an insulator, a connection module for coupling the robot body to an installation / dismantlement mechanism, a wing opening / closing module for manually separating the robot body from the insulator string, a measurement module for measuring electrical properties of the insulator, a controller for controlling operation of the robot body, and a crack detection unit for detecting cracks formed in the insulator.
Owner:KOREA ELECTRIC POWER CORP
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