116 results about "Insulator strings" patented technology

The utility model discloses a ten-bundle conductor tension string suitable for ultrahigh altitude, which belongs to the technical field of tension strings and comprises two groups of tension string units. The tension string unit comprises two insulator strings which are arranged in parallel at an interval; one end of the insulator string is connected with an iron tower cross arm through the hanging point side fitting, and the other end of the insulator string is connected with a lead through the lead side fitting; the wire side fitting is provided with a shielding ring assembly. The wire side fitting is also provided with a grading ring which is wound on the tension string unit. According to the ten-bundle conductor strain insulator string suitable for the ultrahigh altitude, the structure can ensure that the electromagnetic environment and the air gap of a power transmission line do not exceed the limit under the condition of the ultrahigh altitude, the ecological environment protection requirement is met, and the engineering construction, the economic development and the ecological environment protection are organically combined.

The invention discloses a power transmission equipment insulator defect identification method and device, equipment and a medium, and belongs to the field of power equipment defect identification, and the method comprises the steps: respectively extracting corresponding feature data from electric signal monitoring data, infrared data and image data of an insulator string; fusing the characteristic data corresponding to the electric signal monitoring data and the infrared data through a cross-modal attention mechanism, and positioning an abnormal region; determining a defect physical region image of the insulator string according to the abnormal region and feature data corresponding to the image data; performing secondary verification on the defect physical region image according to the environmental parameter data of the space where the insulator string is located; and when the secondary verification is passed, respectively calculating a plurality of defect judgment indexes of the insulator chain according to the defect physical region image, and determining that the insulator chain has defects when any defect judgment index meets a preset condition. According to the invention, the problem of low insulator defect identification accuracy in a complex environment can be solved.

The invention belongs to the technical field of power robots. According to the suspension insulator layered progressive intelligent deicing method, robot and system, in the insulator multi-dimensional sensing intelligent recognition step, after the deicing robot is hung to a tower where an insulator string is located, an insulator multi-dimensional sensing recognition agent is called to recognize an insulator string image in an icing state, and the insulator string image is subjected to image recognition; obtaining a position identification result and an icing thickness of the insulator string; in the layered progressive adaptive decision-making step, an autonomous decision-making agent is called to adaptively select a deicing strategy according to the icing thickness, and a deicing clamping jaw is controlled to deice the insulator chain layer by layer according to the selected deicing strategy and the position identification result of the insulator chain; in the effect evaluation closed-loop strategy adjustment step, the ice detection agent is autonomously called in the deicing process to evaluate the deicing effect, and the deicing strategy is dynamically adjusted in a closed-loop mode according to the deicing effect evaluation result. According to the invention, the accuracy, efficiency and safety of deicing operation are greatly improved.

This application provides a method and system for monitoring and alarming the tilt of overhead ground wire suspension insulator strings. The method includes: synchronously acquiring insulator string operating status and environmental data through a multi-sensor acquisition module, including micro-meteorological, tilt angle, infrared image sensors, and a right-angle gate module; performing Kalman filtering, noise reduction, normalization, and LZ77 compression on the data to form a unified feature dataset; real-time anomaly detection and data upload at the edge using a lightweight CNN-LSTM fusion model; and fault type identification and severity assessment via ResNet in the cloud, including accurate displacement calculation; generating early warning information and maintenance suggestions by combining historical data and maintenance strategies, and pushing them through a multi-channel method including tower-side audible and visual alarms and mobile terminal push notifications. This application achieves all-weather, high-precision monitoring, improves the accuracy of anomaly identification and alarm timeliness, ensures the safe operation of transmission lines, and reduces power outage losses.

The invention discloses a method and a system for predicting discharge voltage of an insulator string at an extreme temperature, and belongs to the technical field of high voltage and insulation. The method comprises the following steps: acquiring test data of an insulator string discharge voltage test, preprocessing the test data, and dividing the preprocessed test data into a training set and a test set according to a preset proportion; obtaining an optimal key hyper-parameter, establishing an XGBoost model through the optimal key hyper-parameter, and training the XGBoost model by using the training set to obtain an XGBoost discharge voltage prediction model; and inputting a new data set to be predicted into the model, and predicting the discharge voltage of the insulator string at the extreme temperature to obtain a predicted value of the discharge voltage of the insulator string at the extreme temperature. Compared with a traditional discharge voltage calculation method, the method can predict the discharge voltage of insulators with different string numbers and under different meteorological conditions, is higher in accuracy, does not need a tedious calculation program, and is high in prediction efficiency.

The invention discloses a composite porcelain insulator string, and belongs to the technical field of power equipment. The insulator string is mainly formed by compounding an end hardware fitting, a core rod and a porcelain piece sleeved on the core rod. The core is that the fittings are crimped at two ends of the core rod for connection; the core rod is used as a bearing and internal insulation main body; the porcelain piece is provided with the hollow pipe and the umbrella skirts, and the porcelain piece and the core rod are glued into a whole through the insulation paste, so that the creepage distance is effectively increased, the core rod is protected from environmental erosion, and aging and brittle failure of the core rod are prevented. The composite insulator combines the advantages of good mechanical stability of a porcelain insulator and strong bearing capacity of a composite insulator, has excellent electromechanical performance and long-term operation reliability, and is particularly suitable for an ultra-high voltage transmission line.

The utility model discloses a disc-shaped suspension insulator duplex single-hanging-point V-shaped suspension string which comprises a spacing frame, the spacing frame is provided with a fast-assembly mechanism, the top of the spacing frame is provided with two V-shaped disc-shaped insulator strings, the outer sides of the two disc-shaped insulator strings are provided with a voltage-sharing mechanism, the fast-assembly mechanism comprises a support frame, and the support frame is provided with a fixed support. A plurality of wire seats are arranged on the outer side of the supporting frame, a connecting seat is fixedly connected to one end of each wire seat, a movable cover is rotationally connected to each connecting seat, and an embedded clamping block is fixedly connected to the end of each movable cover. According to the disc-shaped suspension insulator duplex single-hanging-point V-shaped suspension string, wires are placed on the wire base, the movable cover is rotated, so that the magnetic embedded clamping block at the end of the movable cover is inserted into the wire base, then the rotating head is rotated to press the embedded clamping block, and then the rotating head is pressed inwards for locking, so that the multiple wires are rapidly installed at the same time, and the installation efficiency is improved. And the installation efficiency and convenience are effectively improved.

The invention belongs to the technical field of power transmission line inspection, and provides an intelligent identification and automatic detection method and system for the front end of a power transmission line insulator, and the method comprises the steps: analyzing a preset route in response to an inspection task, and flying to a target waypoint according to waypoint information in the preset route; a video stream of a target waypoint is obtained, image frames in the video stream are identified by using a pre-trained insulator string identification model, and an insulator string is detected; adjusting the posture to enable the target insulator string to be centered in front of the target insulator string; distance information of a front detected insulator steel cap is obtained, the three-dimensional coordinate position of a center point is calculated in combination with fuselage parameters and external parameter calibration data, and based on the three-dimensional coordinate position of the center point, the pixel-level offset of the center point from the center position of a video frame is calculated; and according to the relationship among the image coordinate system, the camera coordinate system and the world coordinate system, carrying out fine adjustment on the position of the machine body so as to carry out piece-by-piece contact type detection. According to the invention, the safety, precision and efficiency of power transmission equipment detection are significantly improved.

This invention discloses a testing device for tension insulator strings in high-voltage transmission lines, belonging to the field of power line inspection technology. The device includes a C-shaped semi-enclosed support mechanism, a walking drive mechanism, a defect detection mechanism, and a radial adaptive locking adjustment mechanism. The C-shaped semi-enclosed support mechanism adopts an open frame that can be wrapped around the outside of the insulator string. A radial adaptive locking adjustment mechanism is installed at the opening, and an adaptive flexible fitting component is configured on the inner side to achieve assembly gap compensation and stable fitting. The walking drive mechanism adopts a tracked structure adapted to the insulator contour and is combined with a skirt limiting structure to achieve anti-slip and anti-detachment. The defect detection mechanism integrates visual inspection and electrical parameter detection components, enabling online identification of icing, surface damage, and zero / low-value insulation defects. This invention is easy to assemble, highly adaptable, and provides accurate detection, significantly improving inspection safety and automation levels. It is suitable for online automated inspection of tension insulator strings in high-voltage transmission lines.

The utility model relates to the technical field of high-voltage power transmission lines, in particular to a cable terminal leading-down structure based on reconstruction of a built overhead power transmission line, which comprises a built steel pipe pole main pole, a cable terminal equipment cross arm, a first cable clamp cross arm and a second cable clamp cross arm. A ground wire cross arm and a plurality of wire cross arms are arranged on the built steel pipe pole main pole; the wire cross arms comprise an upper wire cross arm, a middle wire cross arm and a lower wire cross arm; an upper wire leading-down cross arm is arranged at the end part of the upper wire cross arm, and a middle wire leading-down cross arm is arranged at the end part of the middle wire cross arm; the cable terminal device cross arm is provided with a cable terminal base, a lightning arrester base and an inversely-hung insulator string hanging plate. The cable terminal leading-down structure provided by the utility model is rebuilt based on the built overhead transmission line steel pipe pole, an old tower does not need to be dismantled, a new tower does not need to be newly built, the occupied area does not need to be increased, the construction cost is greatly reduced, and the problems that an urban corridor is narrow, underground pipelines are numerous, and the cable terminal tower is difficult to be newly built are solved.

The utility model relates to high -voltage electrical equipment insulator live working robot and working method relates to electrical equipment technical field for solving the problem of low efficiency of insulator string manual cleaning in prior art, including base, clamping component, lifting assembly and operation component, clamping component includes clamping rod, clamp and clamping drive mechanism, one end of clamping rod is rotatably connected with base, the other end of clamping rod is fixed with clamp, and clamping drive mechanism is located on base and drives the swing of clamping rod, operation component includes main guide rail, operation head, auxiliary guide rail and air pump, one auxiliary guide rail is slidably installed at both ends of main guide rail, operation head is slidably connected with support rail and the initial position of operation head is located in main guide rail, the circular arc inner wall of operation head has air hole and camera, air hole is connected with air pump on base through air pipe, and camera is used for shooting insulator string surface image, lifting assembly is located between main guide rail and base, the utility model can realize the automatic cleaning and detection of insulator string.

A power transmission line fault simulation and simulation test method and system, a transient simulation model of an actual power transmission line is established, and a wave speed is simulated and calculated; a simulation test is carried out on a test line, a fault source is output, a normal current at a power frequency is first output, a lightning impulse is injected at a peak of the normal current at the power frequency, and then a flashover discharge current of an insulator string is output, a duration of the flashover discharge current is calculated according to a lightning fault current set during simulation; if the test is normal, wave head times captured by two fault detection devices are obtained, corresponding two positioning errors are calculated in combination with the wave speed calculated by simulation, if the positioning errors exceed a set error threshold, it is indicated that the fault detection device is unqualified; otherwise, it is qualified, and a fault test is carried out by using the qualified fault detection device. The present application can efficiently carry out a detection test of a power transmission line fault positioning device.

This application provides a multi-view detection method and related equipment for the distribution and bridging degree of frost on suspension insulators, belonging to the field of intelligent monitoring technology for transmission lines. The method includes: extracting and registering the foreground of the insulator before and after icing from a group of images taken from multiple perspectives; locating the axial position range of each umbrella unit using the axial gradient distribution features of the ice-free reference image; extracting and quantifying the ice edge using the circumferential gradient saliency features of the iced image; defining and calculating multi-dimensional parameters such as the circumferential / axial distribution non-uniformity of the ice, the bridging degree of local umbrella units, and the overall bridging degree of the insulator string; and finally comprehensively evaluating the uniformity of the icing distribution and the bridging risk level, outputting a quantitative report and operation and maintenance decision recommendations. This application effectively overcomes the detection challenges of variable perspectives and complex lighting conditions in natural scenes through bidirectional gradient feature collaboration and multi-view adaptation mechanisms, providing accurate and reliable technical support for power grid icing prevention and disaster reduction.

The utility model discloses an insulator resistance value high-efficiency detection device, which belongs to the technical field of electrical variable measurement, and comprises an unmanned aerial vehicle main body, the bottom end of the unmanned aerial vehicle main body is fixedly provided with a mounting rack in a threaded manner, the bottom end of the mounting rack is fixedly provided with a detection assembly, and the detection assembly comprises a first insulating rod. The tail of one end of the first insulating rod is connected with an electric control box, and a second insulating rod is inserted into an inner hole of the other end of the first insulating rod. The probe bracket detection part in the detection device can rotate and adjust the probe bracket corresponding to the dial according to different mounting modes of insulator strings in detection so as to ensure that the probe is in close contact with steel caps at the two ends of the insulator, and in the detection process, when the probe is carelessly clamped on an insulator sheet, the probe bracket can be rotated to adjust the probe bracket. The unmanned aerial vehicle is increased in power and flies backwards, the probe can be pulled out, the air crash risk is reduced, meanwhile, connection is conducted in cooperation with a pipe hanging frame made of insulating materials, the safety of the detection process is further improved, and potential safety hazards such as breakdown are reduced.

The invention belongs to the technical field of insulator chain detection, and discloses an insulator chain detection method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining the position information of a target insulator chain, and obtaining the position information of the target insulator chain according to the position information; controlling the visual detection flying robot carrying the detection instrument through the mechanical arm to fly to a hovering position above the target insulator string, identifying the axis of the target insulator string so as to control the visual detection flying robot to rotate, and enabling the flying plane of the visual detection flying robot to be parallel to the axis, controlling the visual detection flying robot to drive a mechanical arm so as to place a detection instrument on the target insulator string, and enabling the detection instrument to complete the detection operation of the target insulator string; through the method, the detection efficiency of the insulator string is improved.

This utility model relates to the technical field of surge arresters, specifically a surge arrester for line overvoltage protection, including a surge arrester mounting base, a surge arrester body, an insulator string, and a surge arrester assembly. The surge arrester body is connected to a fixing point on the surge arrester mounting base, and an insulator string is fixed to an external mounting point on the surge arrester body. An insulator string is also provided at a mounting point on the surge arrester assembly. In this utility model, expanding foam is filled inside the plastic cover. The expanding foam can expand and fill the outside of the ceramic ring, connecting ring, and threaded ring, providing anti-collision protection for the ceramic ring, connecting ring, and threaded ring. When the surge arrester terminal is wrapped with rubber, the expanding foam and the plastic cover shield the silicone rubber jacket, preventing cracking and powdering of the transformer inlet terminal under ultraviolet radiation and ozone. The expanding foam and the plastic cover prevent damage to the transformer inlet terminal of the surge arrester.

The invention discloses an insulator internal defect identification method and system based on a terahertz technology, and relates to the technical field of nondestructive detection.The method comprises the steps that firstly, a frequency spectrum obtained after echo signal processing of an insulator is obtained in the healthy state of the insulator and serves as a reference healthy fingerprint; then, echo signals are monitored in real time, the real-time frequency spectrum is compared with the reference frequency spectrum through a state difference value method, and newly-added reflection caused by internal defects such as microcracks is recognized. Furthermore, the invention provides an optimized deployment strategy for installing the sensors at electric field change sensitive positions in the insulator string, and provides a scheme for carrying out data cross validation by adopting multiple sensors for a long insulator string, so that the detection accuracy is improved to the maximum. The system is also integrated with a LoRa wireless communication module, and reliable remote transmission of data in a high-voltage strong electromagnetic interference environment is realized. According to the invention, on-line, lossless and high-precision monitoring of internal defects of the insulator is realized.

This invention discloses a three-dimensional intelligent segmentation method and device for insulator strings based on fused point cloud features. The method includes: acquiring the original point cloud of a power transmission equipment using lidar; the power transmission equipment includes insulator strings; filtering the original point cloud to generate a filtered original point cloud; determining the normal vector of each point in the filtered original point cloud; setting the vector field generated based on the normal vector to a priori that follows a periodic Gaussian process prior distribution; reconstructing the implicit surface from the filtered original point cloud using the Poisson equation of the implicit surface defined by the prior-set vector field and the prior-set vector field; adaptively sampling the point cloud points in the implicit surface to generate a dense point cloud; generating a segmentation result using a pre-trained point cloud segmentation model; and determining the final segmentation result based on the filtered original point cloud and the segmentation result. This invention can improve the efficiency, accuracy, and robustness of point cloud segmentation for small components of insulator strings.

The application discloses a four-ground-wire lightning protection communication intelligent pole tower, which comprises a pole tower body, a first cross arm, a second cross arm and a third cross arm arranged horizontally from bottom to top on the pole tower body, insulator strings arranged at the lower parts of the two ends of the first cross arm, the second cross arm and the third cross arm, conductors arranged at the lower ends of the insulator strings, two extension arms arranged above the third cross arm, pigeon-type ground wire supports arranged at the top ends of the extension arms, inner side ground wire fittings arranged on the sides of the pigeon-type ground wire supports close to the pole tower body, outer side ground wire fittings arranged on the sides of the pigeon-type ground wire supports away from the pole tower body, inner side ground wires arranged on the inner side ground wire fittings, outer side ground wires arranged on the outer side ground wire fittings, and the height of the inner side ground wires being higher than the height of the outer side ground wires. The four-ground-wire lightning protection communication intelligent pole tower has the advantages that the reasonable arrangement of the four ground wires can obtain more excellent lightning protection performance, and the four ground wires are made of OPGW composite optical cables, so that the communication capacity is improved.

The invention relates to a line windage yaw monitoring and early warning method and device, computer equipment, a storage medium and a program product. The method comprises the following steps: acquiring an acquisition image of an environment where a tower is located sent by an image sensor, determining a target change rate of a windage yaw angle of an insulator string within a preset time length according to the acquisition image, and carrying out line windage yaw monitoring and early warning according to the target change rate and a preset change rate; the acquired image comprises a tower and an insulator string connected with the tower through a lead. According to the embodiment of the invention, the target change rate of the windage yaw angle of the insulator string within the preset duration is determined based on the acquired image sent by the image sensor arranged on the wire, and line windage yaw monitoring and early warning are performed based on the target change rate and the preset change rate, so that early sensing and early warning of the windage yaw risk can be realized; and the power transmission line operation reliability is improved.

This invention provides a method, system, and storage medium for automated and high-precision batch soft and hard collision verification of transmission line insulator string attachment points based on GIM models. It relates to the field of tension insulator string collision verification technology and includes: identifying all tension insulator string tower attachment points to be tested and their corresponding hardware components from the model; constructing a refined model library; completing the initial import and placement of the refined model; achieving precise alignment of the hardware components with the refined tower attachment point model in spatial position and orientation; driving the refined model from a static installation state to a dynamic spatial state under specific operating conditions; and performing hard collision checks on each inspection unit in the dynamic spatial state. This invention liberates designers from tedious and repetitive work, resulting in an order-of-magnitude improvement in verification efficiency.

According to the anti-windage yaw and anti-bird suspension insulator string and the installation method, the anti-bird baffle and the damper are arranged on the connecting column and matched with the flange plate at the top, so that integration of anti-bird and anti-windage yaw functions is achieved, the operation safety of a power transmission line is improved, and the failure rate caused by bird damage and windage yaw is reduced; a windage yaw prevention and bird prevention suspension insulator chain comprises an insulator chain main body, the insulator chain main body comprises an insulator chain, the upper end of the insulator chain is provided with a connecting column, and the lower end of the insulator chain is provided with a sleeve assembly for a power transmission line to pass through; an anti-bird baffle is arranged at the bottom of the connecting column, a flange plate is arranged at the top of the connecting column, a damper is arranged between the flange plate and the anti-bird baffle, and the connecting column is sleeved with the damper.

The utility model relates to the technical field of electrified railway application, in particular to a multifunctional anti-bird cover for an electrified railway, which comprises a first mounting sheath and a second mounting sheath which are arranged oppositely, and the sides, close to each other, of the first mounting sheath and the second mounting sheath are detachably connected. The first mounting sheath and the second mounting sheath are hollow, a mounting sheath cavity is formed between the first mounting sheath and the second mounting sheath, and one end of the first mounting sheath extends forwards to be provided with an arc-shaped cover body. According to the utility model, the structure is novel, the design is ingenious, the moving or staying frequency of birds on the umbrella skirts of the insulator chain is reduced, the amount of bird droppings on the umbrella skirts of the insulator chain is reduced, the influence of the bird droppings on the insulation performance of the insulator chain is reduced, the reliability and safety of an overhead line on an electrified railway are improved, and a certain shielding effect is achieved; and external corrosion is reduced, so that the multi-functional effect is achieved.

The application discloses a high-stability high-low voltage complete switch device, relates to the technical field of high-low voltage complete switch devices, and comprises a transformer body, the top surface of the transformer body being provided with a bottom plate. Three first insulator strings and a rectangular connecting plate are arranged on the top surface of the front side of the bottom plate, and a U-shaped high-voltage wire clamp is installed at the front end of the rectangular connecting plate. Three second insulator strings and an L-shaped connecting plate are arranged on the top surface of the rear side of the bottom plate. A pair of conductive swing arms are hingedly arranged between the L-shaped connecting plate and the rectangular connecting plate, and a third insulator string is hingedly arranged at the middle of each pair of conductive swing arms. An L-shaped contact plate is arranged on the back surface of the L-shaped connecting plate, a U-shaped low-voltage wire clamp is assembled at the rear end of the L-shaped contact plate, and the bottom plate is connected with each L-shaped contact plate through a swing arm mechanism. The application integrates conductive, insulating and transmission structures, is firm in wiring, strong in anti-disturbance capacity, accurate in action response, high in conductive efficiency, good in protection performance, suitable for severe working conditions, low in failure rate, excellent in overall stability, and capable of meeting the long-term reliable use requirement of high-low voltage switching.

The application discloses a high-stability high-low voltage complete switch device, relates to the technical field of high-low voltage complete switch devices, and comprises a transformer body, wherein the top surface of the transformer body is provided with a bottom plate. Three first insulator strings and a rectangular connecting plate are arranged on the top surface of the front side of the bottom plate, and a U-shaped high-voltage wire clamp is installed at the front end of the rectangular connecting plate. Three second insulator strings and an L-shaped connecting plate are arranged on the top surface of the rear side of the bottom plate. A pair of conductive swing arms are hingedly arranged between the L-shaped connecting plate and the rectangular connecting plate, and a third insulator string is hingedly arranged at the middle of each pair of conductive swing arms. An L-shaped contact plate is arranged on the back surface of the L-shaped connecting plate, a U-shaped low-voltage wire clamp is assembled at the rear end of the L-shaped contact plate, and the bottom plate is connected with each L-shaped contact plate through a swing arm mechanism. The application integrates the conductive, insulating and transmission structures, is firm in wiring, strong in anti-disturbance capacity, accurate in action response, high in conductive efficiency, good in protection performance, suitable for severe working conditions, low in failure rate, excellent in overall stability, and capable of meeting the long-term reliable use requirement of high-low voltage switching.

This invention relates to the field of live-line maintenance of high-voltage electrical equipment, and particularly to a live-line insulation cleaning robot system and control method for high-voltage electrical equipment. The method includes: processing scheduling instructions and equipment parameters to obtain safe approach data; controlling the robot to move to the work point, deploying the first robotic arm insulation barrier and collecting working status data to form a safe cleaning zone; acquiring images of insulator strings and identifying the distribution and level of contamination; generating the cleaning trajectory and control data of the second robotic arm; executing the spraying of insulating cleaning fluid, simultaneously collecting leakage current and surface conductivity data and dynamically adjusting cleaning parameters; and retracting the robotic arm and robot based on the live-line data, and generating a maintenance report. This invention, through active insulation barriers and real-time electrical parameter feedback closed-loop control, achieves safe permissioning and dynamic adjustment of the live-line cleaning process, significantly improving the operational safety and intelligence level of live-line insulation cleaning of high-voltage electrical equipment.

The utility model discloses a wineglass-shaped overhanging tower with side-phase half-V-string hanging wires, which comprises a cross arm structure mounted on a tower body, the cross arm structure comprises a middle-phase wire cross arm and side-phase wire cross arms positioned at two ends of the middle-phase wire cross arm, the middle-phase wire cross arm is connected with a V-shaped insulator structure, the side-phase wire cross arms are connected with half-V-shaped insulator structures, and the half-V-shaped insulator structures are connected with the middle-phase wire cross arm. The middle-phase wire cross arm is flush with the side-phase wire cross arm, the half-V-shaped insulator structure comprises a suspension insulator string and a first post insulator string, the suspension insulator string is connected with one end, far away from the middle-phase wire cross arm, of the side-phase wire cross arm, and the extension direction of the suspension insulator string is perpendicular to the extension direction of the cross arm structure. The wineglass tower provided by the utility model not only can provide constraint in the horizontal direction of the wire under the action of wind load, but also can greatly shorten the length of the cross arm structure, reduce the width of a corridor, reduce the house demolition amount in the corridor caused by the construction of a power transmission line, reduce the comprehensive manufacturing cost of the line and save the cost.

The invention discloses a planetary roller bearing intelligent lead screw device and an application method in insulator replacement, and belongs to the technical field of power system operation and maintenance equipment and special operation machinery. The device comprises a screw rod, a planetary roller gear mechanism, a ratchet wrench, a pressure sensor module, a supporting block and a glass connecting plate connecting piece. And the screw rod penetrates through the components and is rigidly connected with the connecting piece. The planetary roller gear mechanism is composed of a screw cylinder with inner and outer teeth and a plurality of threaded rollers annularly distributed in the screw cylinder, and gear-thread coupling transmission is formed. And the ratchet wrench drives the screw cylinder to rotate to drive the roller to rotate, so that the rotary motion is converted into the linear lifting motion of the screw rod, and the stable transfer of the insulator string load is realized. The integrated pressure sensor module monitors the load in real time and gives an over-limit alarm, and data is wirelessly transmitted to a terminal and a background. According to the method, through cooperative operation of the devices, labor saving, controllability, rapidness and intelligentization of insulator replacement operation are achieved.

A kind of zero value insulator identification method and system based on multi-sensing module.First, the space electric field probe is arranged in the space of two insulator strings and the detection path of each probe is defined;Then, by calculating the relative distance difference of two insulator strings, it is judged whether the insulator string is skewed;If not, the space electric field effective value of each detection path at the same time is collected respectively, and whether there is zero value insulator is judged by calculating symmetry value;If not, the space electric field effective value on the corresponding path of insulator string is collected separately at set sampling interval, and whether there is zero value insulator is judged by calculating the electric field deviation rate on each sampling path.The present application has the advantages of non-contact, high real-time, adaptability to complex working conditions, etc. for accurate identification of zero value insulator in insulator string under different postures.

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.