748 results about "Lightning arrester" patented technology

The invention relates to the technical field of image recognition, in particular to a lightning arrester fault thermal imaging picture recognition method and system combined with gaze prediction, and the method comprises the steps: carrying out the down-sampling of an original thermal imaging image to a fixed size, sequentially passing through a multi-layer convolution and a Spatial Softmax layer, and outputting a predicted gaze point track sequence, extracting a key area and a non-key area according to the intensity of the fixation point track sequence; reconstructing the key area to obtain a compressed and recombined target area; inputting the non-key region into a variational auto-encoder to obtain a low-dimensional potential feature vector; and inputting the image-structure joint feature representation into an EffiCroprViT model, and finally obtaining a lightning arrester fault classification result. Local and global features are efficiently fused, the calculation complexity is reduced, background noise interference is effectively suppressed, real-time and accurate identification and early warning of the fault state of power equipment are realized, and the fault classification method has the advantages of high efficiency, high reliability and high reliability. Therefore, the safety and stability of power grid operation are ensured.

The invention discloses a wide temperature range compensation method for resistive current of a lightning arrester, which belongs to the technical field of online monitoring of power equipment, and comprises the following steps: acquiring waveform data under a reference low-temperature working condition, and establishing an initial capacitive harmonic base; acquiring working condition data at any temperature in real time, performing harmonic decomposition, and analyzing to generate a nonlinear distortion feature vector; dynamically correcting the initial base by using the feature vector, and carrying out subtraction operation on the total current harmonic wave to obtain a final resistive current harmonic wave vector; and reconstructing an instantaneous resistive current waveform through inverse transformation and calculating a characteristic value. According to the technical scheme, the initial capacitive harmonic wave base is established, the nonlinear distortion feature vector is generated based on the harmonic distortion of the real-time working condition quantification temperature and valve plate nonlinear coupling, and dynamic feedback correction is conducted on the base, so that the real resistive current waveform in the wide temperature range can be accurately separated and reconstructed, and the accuracy of the real resistive current waveform in the wide temperature range is improved. And the accuracy and reliability of lightning arrester state evaluation are improved.

The invention discloses a lightning arrester installation tool, and belongs to the technical field of distribution network operation and maintenance. The tool comprises a connecting clamping jaw, a limiting plate, a distance adjusting module, a clamping clamping jaw, a drainage wire clamp module and a base hook, wherein the connecting clamping jaw can be used for pre-assembling the lightning arrester on the ground, and an impact wrench is used for automatically tightening the lightning arrester; the limiting plate is accurately positioned through the guide long plate; the distance adjusting module adjusts height through an electric push rod and a guide rail; the clamping jaw is driven by the steering engine to clamp the lightning arrester; the base hook hangs the wire by means of force, and the roller assists in stabilizing. The installation method comprises ground pre-assembly and high-altitude installation, the insulator does not need to be dismantled, the on-pole operation time is shortened by 50%, and the efficiency is doubled. Power failure can be avoided, operation and maintenance intensity is reduced, power supply reliability is improved, and the method is suitable for distribution network non-power-failure operation.

The invention provides a fault indication device of a lightning arrester and the lightning arrester. The fault indication device comprises a target resistor, a low-melting-point alloy, a counterweight and a shell, the target resistor, the low-melting-point alloy and the counter weight are all located in the shell; the first end of the target resistor is connected with a shell of the lightning arrester, the second end of the target resistor is grounded, the upper end of the low-melting-point alloy is in fixed contact with the target resistor, and the lower end of the low-melting-point alloy is connected with the balance weight; the shell comprises a visual subarea at the bottom; the target resistor generates different heat according to the magnitude of the leakage current of the lightning arrester, and when the temperature of the target resistor is higher than the melting point temperature of the low-melting-point alloy, the low-melting-point alloy is melted, and the counterweight falls into the visual partition. According to the device, by triggering melting of the low-melting-point alloy, advanced visual early warning can be provided before the lightning arrester breaks down, and the problem that fault indication of the lightning arrester is not timely is solved.

The invention relates to the field of lightning arrester parameter measurement, in particular to a lightning arrester parameter measurement system and method.The lightning arrester parameter measurement system comprises an induction unit, a detection unit, a data processing unit and a control and positioning unit and is used for generating and focusing laser on the surface of a lightning arrester, collecting an electrical signal and an optical signal of plasma and sending the electrical signal and the optical signal to a processor; the feature quantity is obtained through a feature extraction algorithm, and core parameters of the inversion lightning arrester are calculated through mechanical learning. Plasma is generated through laser focusing, reduction of errors caused by direct electrical connection and contact resistance with a lightning arrester is avoided, the problems of potential safety hazards and interference of traditional contact type measurement are solved, laser focus global scanning, real-time dynamic monitoring and efficient measurement are achieved through the three-dimensional electric translation platform, and the measurement precision is improved. All key areas on the surface of the lightning arrester are covered, compared with single parameter inversion in the prior art, multiple parameters and microscopic parameters are considered, and the prediction precision of key core parameters such as insulation resistance based on the random forest model is further improved.

The invention relates to an unbalanced data-oriented electric power system lightning disaster risk detection method, which comprises the following steps of: S1, gridding a target detection land parcel to obtain a plurality of grid units; S2, based on latitude and longitude coordinates of each grid unit, obtaining line parameters and environment characteristics of each grid unit in combination with a line database and a geographic information base, wherein the line parameters comprise tower height, span, grounding resistance, loop number, lightning arrester number and transformer capacity, and the environment characteristics comprise soil conductivity, building height and land utilization type; and S3, inputting the line parameters and the environment characteristics of each grid unit into a trained first detection model to obtain the thunder and lightning probability and the maximum peak current of each grid unit. Compared with the prior art, the multi-source data such as the tower height, the span, the grounding resistance and the soil conductivity are comprehensively considered, and the risk assessment result has higher regional adaptability and accuracy.

The invention discloses a lightning arrester resistor disc nonlinear conductivity fitting method and system based on a temperature correction coefficient, a medium and equipment, and the method comprises the steps: calculating a current-voltage relation of a lightning arrester according to the volt-ampere characteristic of the lightning arrester and the actual size and material parameters of each component in the lightning arrester, and converting the current-voltage relation into a current density-electric field intensity relation; processing the volt-ampere characteristic interpolation curve in a segmented manner by adopting a logarithm domain processing method and fitting the volt-ampere characteristic interpolation curve; calculating a nonlinear conductivity temperature correction coefficient according to the direct-current reference voltage of the resistor disc of the lightning arrester at different temperatures; calibrating the reference point of the temperature correction coefficient to obtain an equivalent nonlinear conductivity curved surface based on the temperature correction coefficient; performing goodness-of-fit calculation on the obtained equivalent nonlinear conductivity curved surface, and if the goodness-of-fit is relatively high, outputting the equivalent nonlinear conductivity; and if the goodness of fit is relatively low, performing segmentation fitting on the volt-ampere characteristic curve again until the goodness of fit of the equivalent nonlinear conductivity curved surface is relatively high.

The utility model relates to the technical field of transformer parts, and provides a transformer high-voltage lightning arrester mounting support which comprises a supporting transverse plate, a bearing vertical plate, a mounting frame plate, an adjusting unit and a limiting unit. One end of the supporting transverse plate is hinged with the bearing vertical plate, and the other end is fixed with the mounting frame plate; the adjusting unit is arranged above the supporting transverse plate, one end of the adjusting unit is hinged to the bearing vertical plate, the other end of the adjusting unit is fixed to the mounting frame plate, and the adjusting unit is provided with a sliding assembly used for driving the bearing vertical plate to be close to or away from the mounting frame plate; a limiting unit is installed at the upper end of the bearing vertical plate and comprises a supporting disc and a clamping assembly arranged on the supporting disc. The supporting disc is used for supporting a base of the lightning arrester, and the clamping assembly is clamped on the side wall of the base of the lightning arrester. The lightning arrester is fixed in a clamping mode, rapid installation of the lightning arrester is achieved, and the installation and disassembly efficiency of the lightning arrester is improved.

The invention discloses an electric lightning arrester insulation shield capable of being installed without power outage and an installation method, and relates to the technical field of electric protection, the electric lightning arrester insulation shield comprises an insulation cover, an elastic automatic locking mechanism, an installation sheet and a reinforcing plate, the insulation cover is integrally formed, a turnover plate is connected to the lower ends of a left side plate and a right side plate, and the elastic automatic locking mechanism comprises a left locking module and a right locking module; the modules are connected through a pressure piece and a clamping piece through a connecting piece, a lock body part penetrates through a locking hole to achieve locking, during installation, the protective cover is driven by an insulating rod to be horizontally pushed into the top of the lightning arrester, a locking mechanism is extruded and triggered to achieve automatic locking, the protective cover is fixed to an exposed metal piece, and main insulation is not affected. Locking is reliable, the service life is long, operation is convenient, the device can be expanded to multiple fields, and safe operation of equipment is guaranteed.

The invention provides an intelligent lightning arrester for a line. The intelligent lightning arrester comprises a lightning arrester body and an intelligent control box, the lightning arrester body is used for providing a low-impedance grounding channel for overcurrent when overvoltage caused by lightning or switching operation occurs on a line, so that the overvoltage is limited below a safety level, subsequent electrical equipment is protected from being damaged, the lightning arrester body recovers to an insulation state after the overvoltage disappears, and normal operation of a power system is guaranteed. The intelligent control box comprises an embedded intelligent sensing module and a diagnosis module, and the embedded intelligent sensing module is used for collecting operation state parameters of the lightning arrester body in real time; and the diagnosis module is used for evaluating the insulation state of the lightning arrester body by adopting a partial discharge mode recognition model according to the operation state parameters of the lightning arrester body, and predicting the aging trend of a valve plate unit of the lightning arrester body by adopting a valve plate aging trend prediction model. The lightning arrester disclosed by the invention has the dual advantages of compact structure and high-performance protection.

The invention discloses a lightning arrester with an adjusting function, and belongs to the technical field of electrical equipment, and the lightning arrester comprises a lightning arrester body, the bottom end of the lightning arrester body is provided with an insulating seat, the bottom of the insulating seat is provided with a moving table, the top of the insulating seat is provided with a mounting mechanism, the bottom of the moving table is provided with a translation mechanism, and the moving table is provided with a lifting mechanism. A monitoring mechanism is arranged on one side of the translation mechanism, the monitoring mechanism comprises an equipment box, a lightning field intensity sensor, a humidity sensor and a controller, and the translation mechanism comprises a mounting frame, a screw rod, a servo motor, a driving plate and a connecting plate. Environmental electric field intensity and air humidity are monitored in real time through the lightning field intensity sensor and the humidity sensor, the controller dynamically calculates the optimal protection position of the lightning arrester based on a preset algorithm, the servo motor is driven to drive the lead screw to accurately rotate, and front-back translation adjustment of the lightning arrester body is achieved through transmission of the driving plate and the connecting plate. And a thunder and lightning high-incidence area is actively tracked.

The invention relates to the technical field of live detection, in particular to a power distribution gap lightning arrester live detection result compensation algorithm, which comprises the following steps: acquiring a voltage signal and dividing a period section, extracting waveform characteristics to generate a mark set, identifying trend reversal to construct a sudden change section list, analyzing intersection point spacing to form an abnormal set, and calculating a power distribution gap lightning arrester live detection result. And tracking trend deviation to determine correction data, mapping a reference path to reconstruct a reference baseline, and completing conduction state correction recording. According to the method, the detection data of the operation state of the power distribution gap lightning arrester is processed, waveform segmentation marks of a continuous period are constructed, a reversal trend path and slope abrupt change characteristics are combined, potential interference is identified, an abnormal fluctuation area is formed, and a voltage recovery deviation trend is constructed and analyzed through a front window and a trend line segment; and the offset starting and ending points are positioned and the reference path is corrected, so that the reliability of detection data, the accuracy of state judgment and the adaptability of operation conditions are effectively improved.

The utility model provides a lightning impulse protection device for a transformer, and relates to the technical field of lightning arresters, the lightning impulse protection device for the transformer comprises a mounting plate, two ends of the mounting plate are respectively provided with a protection mechanism, the protection mechanism comprises two rectangular blocks, the inner walls of the two rectangular blocks are rotatably connected with a rotating shaft, and the rotating shaft is connected with the mounting plate. A rotating shaft is arranged on the outer side of the screw rod, a coil spring is arranged on one side of the rotating shaft, an L-shaped rod is fixedly connected to the outer surface of the rotating shaft, and a piston block is rotationally connected to one end of the screw rod. The piston block slides on the inner wall of the rectangular groove by rotating the screw rod, so that the airbag sheet deforms and expands outwards, the outer side of the joint of the lightning arrester body and the high-voltage line is wrapped and protected, the influence of rain and sun on the outer side of the joint of the high-voltage line and the lightning arrester body is reduced as much as possible, the service life of the lightning arrester body is prolonged, and the use effect of the lightning arrester body is improved.

The present application relates to the technical field of lightning arresters, and discloses an environment-adjusted lightning arrester, which comprises a protective shell, a lifting platform slidingly arranged in the protective shell, a lightning arrester arranged on the lifting platform, a triggering member arranged below the protective shell and used for driving the lightning arrester to automatically contract, a lightning sensor arranged on the protective shell and used for detecting lightning activities, an opening and closing member arranged on the protective shell and used for being opened when the lifting platform is lifted and being closed when the lifting platform is lowered, so as to control the exposure or hiding state of the lightning arrester, and a mounting member arranged on the protective shell and used for fixing the protective shell on a crossbar. The triggering member based on wind force is arranged, so that when the wind speed is large, the lightning arrester body can be automatically contracted, the key parts such as the insulating umbrella skirt can be retracted into the protective shell, and the wind sand erosion and the insulation aging can be prevented.

The invention belongs to the technical field of lightning current monitoring, and particularly discloses an intelligent lightning arrester capable of monitoring lightning current and a monitoring method, which have the beneficial effects that localized operation calculation is performed through a rule engine, the diagnosis time consumption can be reduced, sampling can be quickly triggered through a dynamic threshold value, communication is performed through a dual-mode communication module, and the intelligent lightning arrester capable of monitoring the lightning current can be used for monitoring the lightning current. Therefore, timely data detection and real-time alarm can be realized, the characteristic extraction unit is used for extracting peak current Ip, wavefront time Tf, wave tail time Tt and oscillation index Oi to realize full coverage of waveform characteristics, and the life evaluation unit is used for calculating accumulated damage and residual life percentage of the equipment to realize full coverage of the waveform characteristics. The trigger threshold value of the current is calculated through the threshold value calculation formula according to the environment temperature and the relative humidity detected by the temperature and humidity sensor, accurate monitoring is achieved, and the situation of false alarm is avoided.

The invention discloses a remote transmission type power transmission line lightning arrester action frequency recording method, which comprises the following steps: data acquisition: acquiring an impact current signal when a lightning arrester acts; data processing: transmitting the impact current signal to a microprocessor to obtain action characteristic information, and calculating the characteristic information according to a specific algorithm to count the number of actions; remote transmission preparation: sending the packaged data to a remote server and a monitoring center by using a wireless communication module; finally, the remote server adopts an edge computing method to analyze the transmission data and store the transmission data in a database; the purposes that operation and maintenance personnel remotely read the number of actions of the lightning arrester counter, field manual checking is not needed, regional limitation is broken through, the monitoring efficiency is improved, and convenient and real-time data support is provided for state evaluation and operation and maintenance decision making of the power transmission line lightning arrester are achieved.

The invention discloses a portable lightning arrester performance detection device and a use method thereof, and relates to the field of lightning arrester detection. The portable lightning arrester performance detection device comprises a direct-current high-voltage generator and a box cover arranged on the direct-current high-voltage generator, a flat cable is arranged between the direct-current high-voltage generator and the box cover, two test main lines are embedded in the flat cable, a placement cavity is formed in the box cover, and the test main lines are arranged in the placement cavity. And a plurality of contact type power connection seats are arranged in the placement cavity in parallel based on the test main line, and each contact type power connection seat can be used for placing the lightning arrester main body and is electrically connected with the lightning arrester main body in a contact manner. According to the portable lightning arrester performance detection device, the multi-station parallel contact type power connection seat is arranged in the placement cavity of the box cover, the test branch line is connected with the test main line, a plurality of lightning arrester main bodies can be placed at the same time, a single detection loop is independently controlled through the change-over switch, and batch detection and station switching are achieved.

The invention discloses a reactive compensation equipment fault automatic early warning system based on an intelligent algorithm, which belongs to the technical field of intelligent power grids and comprises a fault data acquisition module, a feature processing module, a fault diagnosis and evaluation module and a visualization module. Matlab software, Simulink software, a configurable point fast Fourier transform algorithm, a fluorescence imaging technology, a capacitive detection technology and a related intelligent algorithm are combined, reactive power compensation equipment fault analysis is carried out from three angles of a lightning arrester, a capacitor and a reactor, and the fault of the reactive power compensation equipment is analyzed in a chart form. And the visual output of the output result of the reactive power compensation equipment fault diagnosis model is realized. According to the invention, intelligent and precise diagnosis and visual early warning of reactive power compensation equipment faults are realized by comprehensively collecting multi-dimensional data of the lightning arrester, the capacitor, the reactor and overall compensation.

The invention provides a distribution line lightning arrester on-line monitoring method and system, and relates to the technical field of data processing, and the method comprises the steps: distributing each sampling point to a corresponding convex region unit, calculating the surface area of each region unit based on the distribution density and spatial structure characteristics of the sampling points in each unit, and calculating the surface area of each region unit; generating a region density index representing local distribution characteristics; carrying out weighted optimization on the acoustic characteristic parameters by utilizing the regional density indexes, and carrying out multi-modal characteristic fusion on the optimized acoustic characteristic parameters and current characteristic indexes to form a high-dimensional joint characteristic matrix; and inputting the feature matrix into a pre-trained one-dimensional convolutional neural network state recognition model for intelligent diagnosis, and outputting a classification result of the operation state of the lightning arrester. According to the invention, the accuracy and reliability of early fault identification of the lightning arrester are improved.

The invention discloses a double-arm hot-line work robot system and an autonomous and teleoperation control method thereof, and relates to the technical field of intelligent operation and maintenance of power systems and robot control. When visual detection is normal, the robot can autonomously complete tasks such as alignment, clamping and unscrewing of the lightning arrester by means of target pose recognition and operation planning, and intervention of operators is not needed; when visual recognition is limited, a robot system can be smoothly switched to a man-machine teleoperation mode, an operator takes over real-time control through VR end mapping and low-delay incremental pose control, a real operation scene is synchronously mapped to a virtual environment and presented to the operator in an immersive mode through VR glasses, visual interaction operation and fine control are achieved, and the visual interaction effect is improved. Therefore, the real immediacy and continuity of the operation are ensured. The two modes of autonomous operation and man-machine teleoperation are integrated, the autonomous operation efficiency under the conventional condition is ensured, remote intervention of operators can be achieved under the abnormal condition, and operation interruption is avoided.

The invention discloses a lightning arrester leakage current electricity taking and detection coil device, and the device comprises a plurality of electricity taking coils which are used for converting the energy of a magnetic field into electric energy through the induction of the magnetic field generated by the leakage current of a lightning arrester; the collaborative electricity-taking control unit is used for storing and outputting the electric energy generated by the plurality of electricity-taking coils; the high-precision detection coil is used for capturing weak magnetic field change generated by leakage current of the lightning arrester and sending a detected signal to external monitoring equipment; and the device shell is used for placing the plurality of electricity taking coils, the collaborative electricity taking control unit and the high-precision detection coil. The three defects of weak leakage current sensing of a traditional lightning arrester can be overcome: 1, a traditional energy taking and detection sensor is separated and needs to be installed in a power-off manner; and 2, the traditional single-sensor electricity-taking sensor is large in electricity-taking power bottleneck, so that the periodic data monitoring waiting time is long. And 3, a traditional detection sensor is poor in precision, and the magnetic conductivity attenuation of a silicon steel magnetic core at high temperature is large, so that the precision is deteriorated due to temperature influence.

The invention relates to the technical field of power equipment monitoring, in particular to a lightning arrester on-line monitoring system based on self power supply. The system obtains electric energy from leakage current of a lightning arrester through an electricity taking module, realizes self-powered operation of the system, and comprises the electricity taking module, a power management module, a lightning stroke counting module, a leakage current acquisition module, a temperature monitoring module, a display and communication module and an SOC control module. According to the system, the temperature capacity is adopted as an aging state evaluation index of the lightning arrester, the temperature of the lightning arrester and the environment temperature are collected in real time, the corrected temperature capacity is calculated in combination with leakage current and lightning current correction coefficients and dynamic weight adjustment, and accurate aging state judgment is achieved. The system has the functions of periodic acquisition, event trigger detection, data correction, wireless communication and local display, supports long-term online monitoring and remote alarm, and effectively improves the accuracy and reliability of lightning arrester state monitoring.

The invention discloses an uninterruptible power lightning arrester automatic installation tool based on an insulating rod operation method, and relates to the technical field of electrical equipment installation tools. Comprising a drainage wire clamp mounting mechanism, a power supply electric control mechanism, a lifting distance adjustment assisting mechanism, a lightning arrester holding claw mechanism and a lightning arrester connecting piece. A voice control module is embedded into the power supply electric control mechanism, so that single-person remote operation is realized; the lightning arrester connecting piece can adapt to various insulators and cross arms, and can be fixed without dismantling the insulators; the lifting distance adjusting power-assisted mechanism is matched with a moving roller through an electric push rod to realize position and height adjustment; the lightning arrester holding claw mechanism can avoid umbrella skirts to stably clamp different types of lightning arresters; the drainage wire clamp installation mechanism completes installation of a drainage wire clamp and bolt tightening. The device is high in adaptability and convenient and efficient to operate, can work in a non-power-off state, guarantees stable power supply, improves the installation quality and efficiency, reduces the labor intensity and the safety risk, and effectively overcomes many defects of an existing installation tool.

The invention mainly relates to the technical field of live working lightning arrester dismounting and mounting, in particular to a lightning arrester bottom end dismounting and mounting tool for assisting a mechanical arm, which comprises a translation device, a lifting device, a clamping device and a bolt fastening device, a translation sliding table is configured on a first connecting seat body of the translation device, and a vertical moving module is configured on the translation sliding table; the lifting device comprises a push rod assembly, a barrel of the push rod assembly is fixedly connected to the top end of the translation sliding table, a push rod is fixedly connected to the clamping device, the clamping device comprises a second connecting base, a clamping jaw module is arranged on the second connecting base, and the bolt fastening device comprises a shell detachably connected to a vertical movement sliding block of the vertical movement module. The shell is provided with a sleeve used for unscrewing a nut on a screw at the bottom end of the lightning arrester, and the central axis of the sleeve coincides with the holding central line of the clamping jaw module. The technical problems of long operation time and high labor intensity caused by the fact that the bottom end of the lightning arrester and the mounting frame are disassembled and assembled through manual contact in the prior art are solved.

The utility model relates to a standardized gap lightning arrester with an insulation support and a fault indication function, which comprises a standardized gap lightning arrester body, the insulation support is mounted at the lower end of the standardized gap lightning arrester body, a disconnector is mounted at the lower end of the insulation support, and a second screw is mounted at the tail end of the disconnector. A mounting hole is formed in one side, far away from the lower end of the standard gap lightning arrester body, of the insulating bracket, the mounting hole in the insulating bracket is connected with the mounting hole in the metal bracket through a first screw, and a second screw at the tail end of the disconnector is connected with the first screw at the joint of the insulating bracket and the metal bracket through a copper wire woven belt. According to the utility model, the disconnector, the insulating bracket and the metal bracket are arranged on the standard gap lightning arrester body, so that when the lightning arrester is broken down by lightning stroke, the disconnector falls off and forms a fault mark, operation and maintenance personnel can easily find a fault point and can carry out targeted maintenance, and meanwhile, due to the insulating bracket, secondary accidents can be avoided.

The utility model discloses an insulating cover of a distribution network line lightning arrester. The insulating cover comprises a left half cover body and a right half cover body, one side of the left half cover body and one side of the right half cover body are connected with each other through a hinge structure, and the left half cover body and the right half cover body can rotate based on the hinge structure so that the left half cover body and the right half cover body can deviate from each other to be separated or can be folded and closed with each other; when the left half cover body and the right half cover body are mutually folded and closed, a first open hole is formed in the bottom, and the first open hole can fix the insulating cover between the umbrella skirts of the lightning arrester. Meanwhile, the left half cover body and the right half cover body can be mutually connected and locked through the lock catch structures arranged on the left half cover body and the right half cover body. According to the utility model, the left half cover body and the right half cover body can adopt an integrated modular design, the structure is simple, the left half cover body and the right half cover body can be connected and locked with each other through the lock catch structure during installation, and auxiliary fasteners such as pins are not needed, so that the installation is relatively convenient and rapid, and the live installation can be directly carried out when necessary.

The invention discloses a state evaluation system of a metal oxide resistor disc for a lightning arrester, relates to the technical field of electrical performance testing, and solves the technical problems that the specific influence degree of environmental factors on insulation resistance is difficult to accurately quantify, and meanwhile, the influence of various factors such as environmental conditions and operation conditions on the performance of the resistor disc cannot be comprehensively considered. By establishing a correlation model, combining the insulation resistance with environmental parameters, fully considering the influence of environmental factors on the insulation performance of the resistor disc, and by establishing the correlation model, the change rule of the insulation resistance can be analyzed more accurately, and reasonable performance change caused by external conditions is considered, so that the insulation performance of the resistor disc is improved. And the performance degradation of the resistor disc can be reflected more objectively in the subsequent comparison with actual detection data. Aging factors are calculated for each region, and the comprehensive health index of the resistor disc in each region is analyzed in combination with the relative deterioration degree coefficient of the insulation resistor, the relative deterioration degree coefficient of the resistive current and the dielectric loss coefficient.

The invention discloses a power grid lightning arrester on-line monitoring system based on a PHM, and the system comprises a voltage on-line collection module which is used for collecting a voltage signal of a corresponding lightning arrester; the synchronous control module is used for acquiring synchronous sampling data of the leakage current signal and the bus voltage signal; the signal processing module is used for acquiring fundamental components of the leakage current signal and the bus voltage signal and harmonic components of preset times; the feature generation module is used for generating resistive current feature data of the lightning arrester; the data integration module is used for forming a multi-parameter operation state data set of the lightning arrester; the health state evaluation module is used for obtaining a health state evaluation result; the trend analysis module is used for acquiring lightning arrester health state change trend information; and the fault risk assessment module is used for generating a lightning arrester fault risk assessment result and realizing online assessment, trend early warning and fault risk prediction of the health state of the lightning arrester.

This application discloses a wind turbine and a lightning strike current measuring device. The wind turbine includes a lightning arrester, a lightning conductor, a magnetic field sensor, and a controller. The lightning arrester is installed on the blade of the wind turbine to receive lightning strike current. The lightning conductor is located inside the blade and arranged along the length of the blade. One end of the lightning conductor is electrically connected to the lightning arrester, and the other end is electrically connected to the nacelle of the wind turbine. The magnetic field sensor is installed on the yaw platform of the wind turbine to detect the electromagnetic induction value generated when the lightning strike current flows through the yaw platform. The controller is electrically connected to the magnetic field sensor and receives the electromagnetic induction value and calculates the lightning strike current value based on the electromagnetic induction value. The technical solution provided by this application, through the magnetic field sensor preset on the yaw platform, detects the electromagnetic induction value generated when the current flows through in real time and transmits the electromagnetic induction value to the controller electrically connected to it. The controller can accurately calculate the lightning strike current value.

The application relates to the technical field of lightning arrester detection, in particular to a lightning arrester detection device and a detection method thereof, which comprises a workbench, the workbench is provided with a first three-dimensional linear module, a positioning unit, a leakage current detector and a second three-dimensional linear module, the first three-dimensional linear module is provided with a first clamp, and the second three-dimensional linear module is provided with a second clamp; a wiping unit is arranged on the first clamp, and a rotating unit is arranged on the workbench. The first three-dimensional linear module clamps the lightning arrester through the first clamp to feed the lightning arrester, the rotating unit drives the lightning arrester to rotate through the positioning unit, the wiping unit wipes the dirt on the lightning arrester, the leakage current detector detects the leakage current of the lightning arrester, and the second three-dimensional linear module drives the lightning arrester to be discharged through the second clamp. The application can realize the continuity of lightning arrester detection, thereby improving the electric performance detection efficiency of the lightning arrester.