227 results about "Lightning strike" patented technology

The invention discloses a self-sensing monitoring method, system and equipment based on a lightning arrester, and relates to the technical field of power equipment monitoring. The self-sensing monitoring method, system and equipment based on the lightning arrester comprises the following steps: S1, collecting lightning stroke data in real time through multi-sensing fusion, and performing data cleaning and standardization processing on the lightning stroke data; s2, adopting a three-mode sensing and three-source power supply cooperation mechanism to realize state-driven adaptive sensing and energy path switching; s3, automatically scheduling a communication path according to a communication type and link quality, dynamically analyzing and compensating transmitting power, and completing authentication encryption and multi-hop secure transmission; s4, lightning stroke characteristics are extracted, an equipment life prediction model is constructed, residual life prediction is realized, and equipment health grade division and operation strategy adjustment are carried out according to the residual life prediction model; and S5, calculating an electric leakage deviation value by reconstructing a current waveform, triggering graded early warning and linking a communication power and energy supply strategy. The problem that the operation of a power system is affected due to large leakage current monitoring errors is solved.

The invention provides a lightning trajectory data fusion detection based single-tree accurate early warning system for lightning fire, and relates to the technical field of meteorological disaster monitoring and early warning and forest lightning fire prevention and control. The lightning trajectory data fusion detection based single-tree accurate early warning system comprises an electromagnetic radiation receiving module which adopts an antenna array composed of at least four directional antennas to receive electromagnetic radiation signals generated by lightning, the antenna array is connected with a signal conditioning circuit, and the signal conditioning circuit is connected with the electromagnetic radiation receiving module. The signal conditioning circuit amplifies the received weak electromagnetic signal by 100-1000 times, processes the weak electromagnetic signal with a filtering bandwidth of 10 kHz to 1 MHz, and transmits the weak electromagnetic signal to a data acquisition card with a sampling frequency of 5-20 MS / s and a sampling precision of 12-16 bits. By integrating lightning electromagnetic radiation continuous sampling, infrared, visible light and ultraviolet multispectral tracking shooting and atmospheric electric field early warning multi-modal data, a lightning track is accurately detected, and by combining forest environment information, accurate early warning of a single tree where a lightning fire may occur is achieved.

The invention provides a method and a system for predicting residual compression strength of a carbon fiber composite material after lightning stroke, and belongs to the technical field of electric digital data processing. According to the method, by considering the pyrolysis degree of the lightning stroke CFRP composite material, the non-linear mechanical property parameters related to the pyrolysis degree actually measured based on the test and the thermal and mechanical damage results predicted based on the electric-thermal-mechanical multi-physics field coupling model are calculated; an actually measured nonlinear mechanical property thermal damage factor and a mechanical damage factor caused by impact damage are introduced into a constitutive relation of the CFRP composite material, and a finite element simulation method capable of quantitatively predicting the residual compression strength after lightning stroke is established by virtue of finite element software ABAQUS; the problems that in the prior art, the influence mechanism of lightning stroke damage on the mechanical property of the CFRP composite material is not clear, and a simulation modeling method capable of being directly used for calculating and predicting the residual compression strength after lightning stroke is lacked are solved.

The invention relates to the technical field of electronic circuits, in particular to a radio frequency front-end lightning protection circuit and lightning protection equipment. The circuit comprises a primary discharge module, a radio frequency signal protection branch and a direct current power supply protection branch, the input end of the primary discharge module is connected with an antenna port, and the primary discharge module is used for discharging high-energy pulses generated by lightning stroke; the radio frequency signal protection branch is connected between the output end of the primary discharge module and a low noise amplifier of the radio frequency receiving link, and is used for coupling a radio frequency signal to the low noise amplifier and carrying out isolation and voltage limiting on a lightning stroke residual pulse; the direct current power supply protection branch circuit is connected between the output end of the primary discharge module and a power supply voltage stabilizer of the direct current power supply link, and is used for transmitting a direct current power supply to the power supply voltage stabilizer and carrying out isolation and voltage limiting on the lightning stroke residual pulse. The circuit can be combined with a radio frequency front end and used for a navigation antenna, and the lightning stroke protection capability is improved.

The invention relates to the technical field of grounding detection, and discloses a frequency modulation one-way grounding detection system based on frequency adjustment, which comprises a signal generator module used for generating frequency-adjustable sine wave or square wave detection signals, and the frequency adjustment range is 1 Hz to 1 kHz; the self-adaptive frequency modulation control module is internally provided with an LSTM neural network algorithm, collects power grid background noise in real time, generates a 0-500Hz noise spectrogram through fast Fourier transform, and dynamically outputs an interference avoidance frequency band and an optimal detection frequency set; a multi-frequency orthogonal coding module; a dynamic power distribution module; a signal acquisition and processing module; and a fault positioning module. Through a dynamic adaptive frequency modulation technology of an LSTM neural network, by analyzing a power grid noise spectrum in real time, an optimal detection set of a main frequency and an auxiliary frequency is dynamically generated, frequency decision logic is optimized by using closed-loop feedback, sudden interference frequency bands such as lightning stroke and load abrupt change are actively avoided, and thus the real-time performance and reliability of fault detection are improved.

The invention provides high-altitude power generation equipment and system, the high-altitude power generation equipment comprises a wind driven generator, a floater and a lightning protection cage body of a closed structure, and the wind driven generator and the floater are both arranged in the lightning protection cage body; the floating device is cylindrical, helium is filled in the floating device, the wind driven generator is arranged in the cylinder of the floating device, and a rotating shaft of the wind driven generator and the floating device are coaxially arranged. According to the high-altitude power generation equipment provided by the invention, the lightning protection cage body is arranged outside the wind driven generator and the floater, and the wind driven generator and the floater can be protected through the lightning protection cage body, so that the risk that the wind driven generator and the floater are struck by lightning is avoided, and the safety of the high-altitude power generation equipment is enhanced; therefore, the high-altitude power generation system can be used in all weathers. Meanwhile, the floating device of the high-altitude power generation equipment is filled with helium, and compared with the prior art that a hydrogen balloon is adopted as the floating device, helium is adopted, so that the high-altitude power generation equipment is safer.

The invention discloses a vehicle active lightning protection early warning and protection system and method based on electric field induction, and relates to the technical field of vehicle safety. According to the invention, multi-source data related to vehicle thunder and lightning risks are obtained and subjected to time synchronization through a multi-source sensing acquisition module, and a standardized data stream is output; the threatening recognition module is used for carrying out separation and mode recognition and outputting threatening event information and credibility indexes; the air breakdown risk assessment module quantifies the breakdown risk near the vehicle; the climate prior fusion module carries out drift correction on prior climate data of month and hour indexes and outputs a corrected risk index; and the fusion decision and execution module takes multiple types of indexes as input, generates a comprehensive risk index, performs grading judgment, outputs a corresponding protection instruction, and controls an execution mechanism to implement a corresponding grading protection action. According to the invention, active early warning and graded protection of the vehicle in the thunder and lightning environment are realized, and the safety of the whole vehicle and passengers and the reliability of an electronic system are improved.

The invention discloses a 750kV power transmission line plateau type integrated lightning protection method and system, and relates to the technical field of power systems, and the method comprises the steps: collecting the data of a plateau region through the Internet of Things to construct a plateau data set, carrying out the lightning correlation feature screening of the plateau data set, obtaining lightning features, and carrying out the preprocessing of the lightning features, and obtaining pure features; the method comprises the following steps: collecting data of a plateau region through the Internet of Things to construct a plateau data set, performing lightning strike associated feature screening on the plateau data set to obtain lightning features, and preprocessing the lightning features to obtain pure features; establishing a comprehensive evaluation model, and inputting the pure features into the comprehensive evaluation model to obtain a feature comprehensive score; constructing and training a thunderstorm prediction model based on LSTM, and inputting the feature comprehensive score into the thunderstorm model to obtain a thunder and lightning activity prediction value; and dividing a risk interval for the lightning activity prediction value, and making a corresponding lightning protection measure according to the risk interval.

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.

This application relates to the field of lightning rod lightning protection monitoring technology, specifically to a corona field delayed lightning rod and its operation monitoring method. The method includes: collecting corona current and electric field intensity at each moment within each monitoring cycle during the operation of the lightning rod; calculating the first evaluation value and electric field anomaly degree for each time period in each monitoring cycle to obtain the first interference degree for each time period in each monitoring cycle; determining the second evaluation value and cycle anomaly degree for each time period in each monitoring cycle to obtain the second interference degree for each time period in each monitoring cycle; determining the interference coefficient for each monitoring cycle; and evaluating the data distortion status monitored during the operation of the lightning rod. This application, by evaluating the monitored data distortion status, reduces the possibility of misjudgment or omission of lightning strike risk by the lightning rod, and improves the accuracy of assessing the strength of corona discharge generated by the corona field delayed lightning rod under the action of the electric field and the activity of thunderclouds.

A formation method is provided during which a lightning strike protection and thermoplastic material are arranged on a tool. The lightning strike protection includes a plurality of interconnected conductive elements. A thermoplastic composite structure is arranged over the lightning strike protection and the thermoplastic material with the lightning strike protection and the thermoplastic material between the tool and the thermoplastic composite structure. The tool is heated to provide a heated tool. The thermoplastic material is heated using the heated tool to melt the thermoplastic material and bond the lightning strike protection layer to the thermoplastic composite structure.

The present application relates to the technical field of transformer, specifically to a transformer with leading-out device, comprising cross arm, transformer body, first adjusting structure, second adjusting structure, maintenance structure, leading-out structure, fixing structure, lighting structure and rainproof roof; the first adjusting structure is convenient for adjusting the position of the hoop according to the distance between the poles, improves the installation efficiency, and reduces the occupied space during transportation; the second adjusting structure can adjust the angle of the hoop to closely fit the pole when the pole is inclined, improves the installation stability; the maintenance structure can provide a wide operation space by rotating the rainproof roof, improves the maintenance efficiency; the fixing structure fixes the rotating rod after the rainproof roof is rotated in place, avoids the gear wear caused by the operation vibration of the transformer body, ensures the stability of the rainproof roof; the leading-out structure can safely lead the lightning into the ground when lightning strikes, provides lightning protection for the transformer body, and ensures the stable operation of the power system.

The utility model belongs to the technical field of seismological observation, and particularly discloses a connecting structure for seismological observation cave weak signal transmission lines, which comprises a sleeve shell and a shaping chamber, the shaping chamber is arranged between material guide grooves in the sleeve shell, three groups of wire inlets are arranged in the right side of the sleeve shell, and the right side of the sleeve shell is provided with three groups of wire outlets. An upper wire harness is transversely inserted into the top end of the interior of the sleeve shell, and a middle wire harness is transversely inserted into the center of the interior of the sleeve shell. According to the connecting structure for the earthquake observation cave weak signal transmission line, the metal ring is fixedly connected in the annular groove, the metal rod serves as a tool for sealing and balancing the metal ring to be welded, the inner side wall of the metal ring is clamped in the annular groove of the rubber sleeve, and the front end and the rear end of the bottom of the metal ring are fixed through the supporting rod and the foot pad. And when lightning stroke occurs, electric power can be conducted into soil by virtue of an electricity leading mechanism formed by the metal rod, the metal ring and the supporting rod, so that the problem of lack of lightning stroke protection is solved.

The invention discloses an unmanned aerial vehicle wind driven generator blade lightning protection detection method, and belongs to the technical field of wind power generation. The system comprises a multi-mode perception and hidden defect detection module, a digital twin and full life cycle management module, an AI-driven autonomous decision module, an extreme environment adaptation and multi-model compatible module and a full-scene operation and maintenance closed-loop management module. The multi-mode sensing and hidden defect detection module integrates visible light, thermal imaging, ultraviolet, microwave radar and laser radar, and realizes high-precision detection of blade surface lightning stroke traces and internal downlead fracture hidden defects. According to the method, the hidden defect detection rate is improved through a multi-mode perception fusion technology, and the fracture positioning error of the internal downlead is controlled within + / -8cm; the installation angle deviation measurement precision of the lightning arrester is high and is greatly improved compared with a traditional method, the anti-interference design enables the automatic wiping frequency of the ultraviolet lens in the salt fog environment to be reduced, and the dynamic gain adjustment range of the thermal imaging module is expanded under the strong wind condition.

The invention discloses a multi-distributed power supply participated power distribution network collaborative recovery method and system. The method comprises the steps of performing first classification on a target power distribution network, and establishing a plurality of first fault recovery models about a first classification result according to the first classification result; establishing a first line simulation fault judgment strategy based on the target power distribution network; updating the plurality of first fault recovery models according to the first line simulation fault judgment strategy to obtain a plurality of second fault recovery models; and solving the plurality of second fault recovery models to obtain a power distribution network collaborative recovery plan. According to the technical scheme, various distributed power supplies in the power distribution network can be effectively integrated and utilized, and rapid and effective load recovery is achieved. In practical application, the method can significantly improve the self-recovery capability of the power distribution network after the power distribution network suffers from emergencies such as lightning stroke, reduce power failure time, reduce economic loss, and improve the overall stability and reliability of the power grid.

The application provides a method for simulating initial attachment points of lightning strikes on an airplane, which comprises the following steps: establishing a connection between a first software and a second software; presetting an initial simulation environment in the first software, calculating a first electrostatic field value of the initial simulation environment, and transmitting the first electrostatic field value to the second software; obtaining surface charges based on the first electrostatic field value by Gauss law, and judging whether a positive polarity leader is started; obtaining a negative charge quantity of the positive polarity leader according to the principle of electrostatic equilibrium; obtaining an airplane electric potential according to the negative charge quantity; setting a boundary condition according to the airplane electric potential, and calculating a second electrostatic field value; judging whether a negative polarity leader is started based on the second electrostatic field value by Gauss law, and recording a starting position if the negative polarity leader is started. The method solves the problem of dependence of a traditional method on the geometric shape and motion state of the airplane by converting the charge distribution of the leader channel into the potential boundary condition.

The invention relates to the technical field of model construction, and particularly discloses a 100GNRZ direct dimming anti-lightning stroke SOP scrambling voltage model construction method based on deep learning, and the method comprises the following steps: S1, collecting the bias voltage, modulation depth, SOP scrambling data and environmental parameters of a thin film lithium niobate modulator in a simulated lightning stroke environment to construct a data set; s2, performing normalization and noise filtering on the data, extracting correlation characteristics of bias voltage and modulation depth and time sequence characteristics of SOP scrambling by adopting a CNN-LSTM hybrid network, and introducing physical characteristics of a modulator as constraints; s3, taking SOP tolerance maximization and photoelectric loss minimization as targets, and training the model through an adaptive gradient descent algorithm to obtain an anti-lightning model; and S4, deploying the model to 100GNRZ direct modulation light transmission equipment, and dynamically generating an optimal bias voltage for compensation by monitoring equipment parameters in real time.

A lightning-strike-danger-level derivation device according to the present invention derives a lightning-strike danger level for each of a plurality of regions defined in the form of a mesh on the basis of latitudes and longitudes. The lightning-strike-danger-level derivation device is provided with: an echo-intensity derivation unit that derives an altitude distribution of echo intensities for each of the plurality of regions by using observation data acquired from a meteorological radar; a temperature derivation unit that derives an altitude distribution of temperatures for each of the plurality of regions by using observation data acquired from a meteorological observation device; a feature derivation unit that derives features used to derive the lightning-strike danger level; and a lightning-strike-danger-level derivation unit that derives the lightning-strike danger level by using the features. The feature derivation unit derives a cumulative echo intensity for each of the plurality of regions, the cumulative echo intensity being a partial or entire cumulative value of echo intensities along the vertical direction. The lightning-strike-danger-level derivation unit derives an altitude distribution of lightning-strike danger levels for each of the plurality of regions by using the cumulative echo intensity and the altitude distribution of temperatures.

The invention discloses a distribution line lightning stroke risk assessment method, device and equipment and a medium, and belongs to the technical field of power equipment risk assessment, and the method comprises the steps: obtaining the lightning stroke risk assessment index data of each line segment on a target distribution line after preprocessing, constructing a forward matrix, carrying out the standardization processing of the forward matrix, and obtaining the lightning stroke risk assessment index data of each line segment on the target distribution line; obtaining a standardized matrix of lightning stroke risk assessment indexes; based on this, determining the weight of each lightning stroke risk assessment index by using an entropy weight method; constructing a weighted standardized matrix based on the weight and the standardized matrix; and based on the weighted standardization matrix, a TOPSIS method is adopted to determine a lightning stroke risk assessment result of each line section on the target distribution line. The method is effective and accurate, and accurate identification and quantitative sorting of lightning stroke risks of the distribution line section can be realized.

This invention discloses a test system for lightning shunting characteristics of standing forest trees, as well as a test and analysis method for lightning shunting characteristics. The test system includes a lightning pulse current source, standing forest trees, a clamping mechanism, and a unit for controlling the lightning current and measuring and analyzing its electrical parameters. Based on the natural structural characteristics of standing forest trees, the system uses experimental data on the shunting of lightning current in different zones of the standing forest trees. Through statistical methods, it obtains the zoned characteristics of the standing forest trees and the correlation between the shunting characteristics of lightning current in different zones and factors such as the moisture content, temperature, and humidity of the standing forest trees. This forms a database of lightning shunting characteristics of standing forest trees that simulates the characteristics of lightning-induced fires in different regions, laying the foundation for multi-physics modeling of lightning strikes on forest combustibles, research on lightning-induced fire mechanisms, and prediction algorithms.

1. Name of the designed product: lightning rod (lightning bowl lightning cap lightning gourd). 2. Use of the designed product: for high buildings or objects to avoid lightning strikes. 3. Design points of the designed product: in shape. 4. Picture or photo that best indicates the design points: design 2 perspective view 1. 5. Design 2 is designated as the basic design.

The application shows a kind of insulator service performance evaluation method considering multiple lightning and airflow factors, first, a kind of insulator service performance evaluation platform considering multiple lightning and airflow factors is built;Based on the evaluation platform, multiple lightning impact test and strong airflow operating environment simulation are carried out for line insulator;The strong convection influence factor σ of line insulator is calculated;The service performance evaluation factor τ of line insulator under multiple lightning is calculated;Finally, the service performance evaluation of insulator is carried out according to the calculated service performance evaluation factor τ of line insulator under multiple lightning.The application can not only effectively simulate the strong airflow effect on line insulator, but also effectively simulate the multiple lightning working condition of line insulator;Intelligent operation and control can be completed through host computer;The service performance of line insulator considering airflow factor and multiple lightning impact can be comprehensively evaluated and analyzed, and maintenance suggestions are put forward, which improves the power supply stability of power grid system.

The present invention relates to a distributed transmission cable fault location diagnosis system and location diagnosis method, which includes three parts: a monitoring terminal, a central station, and a user system. The monitoring terminal includes a data acquisition unit, a central control unit, a communication unit, and a power supply unit. The central station includes a pre-processing module, a database, a fault diagnosis module, and a WEB service module. The user system includes a mobile receiving terminal and a computer access terminal. According to the waveform characteristics of the traveling wave current, lightning faults and non-lightning faults are identified; for lightning faults, according to the waveform differences of the traveling wave current, lightning strike back faults and lightning strike bypass faults are identified. By optimizing the arrangement between the main line monitoring nodes, planetary monitoring nodes, and the central station, resource utilization is made more reasonable and the reliability of fault monitoring is improved. When multiple faults occur in the same section of the line, the topological structure of the present invention can find multiple fault points based on waveform superposition and combined with an offline positioning method.

This invention discloses a lightning strike sensor to address the problem of successfully acquiring lightning parameters and implementing the sensor in practical application environments when studying lightning strike parameters. The lightning strike sensor includes a 1.2 / 50μs lightning current amplitude sampling circuit and a time-width sampling circuit constructed based on a general comparator circuit and an RC circuit, connected to the lightning current amplitude sampling circuit. The time-width sampling circuit sequentially includes a wavefront time-width sampling circuit, a half-wave time-width sampling circuit, and a full-wave time-width sampling circuit. Specifically, the lightning current amplitude sampling circuit outputs the amplitude sampling level of the lightning strike waveform; the wavefront time-width sampling circuit acquires the wavefront time of the lightning strike waveform; the half-wave time-width sampling circuit acquires the half-wave time of the lightning strike waveform; and the full-wave time-width sampling circuit acquires the full-wave time of the lightning strike waveform. This allows for successful acquisition of lightning parameters and implementation in practical application environments.

The application discloses a heavy-load railway catenary reliability prediction method and system under thunder weather, and the method comprises the following steps: acquiring historical lightning strike data of the heavy-load railway catenary, and establishing a thunder generation model according to the historical lightning strike data of the heavy-load railway catenary; continuously dividing and sorting time periods of thunder weather at equal intervals, in each time period, using a density-based clustering algorithm to perform spatial clustering on lightning position information to obtain a thunder clustering cluster of each time period; combining thunder parameters to identify a region in which thunder occurs relatively densely in each clustering cluster, and then predicting a lightning range of a next time period through thunder clustering clusters of previous continuous time periods; combining the predicted lightning range and the thunder generation model to calculate a lightning strike failure probability of the heavy-load railway catenary; and calculating a reliability of the heavy-load railway catenary according to the lightning strike failure probability. The method has high usability and accuracy.

The present invention relates to a detachable intelligent monitoring arrester, comprising an arrester housing and a zinc oxide component arranged in the arrester housing, further comprising an intelligent monitoring bottom shell and an intelligent monitoring module, the intelligent monitoring module comprising a drainage transmission line, a current sensor, an intelligent monitoring circuit board and a signal line, the zinc oxide component being electrically connected to the current sensor via the drainage transmission line, the current sensor being connected to the intelligent monitoring circuit board, the signal line being connected to the intelligent monitoring circuit board and extending out of the intelligent monitoring bottom shell, the intelligent monitoring circuit board comprising a zinc oxide monitoring circuit, the zinc oxide monitoring circuit being used to analyze whether the zinc oxide component meets the requirements. By adding an intelligent monitoring bottom shell and an intelligent monitoring module arranged in the detection bottom shell to the arrester housing, information such as the number of lightning strikes of the arrester and the insulation of the zinc oxide can be monitored and saved in real time, and the information can be connected to an external device for reading via a signal line, thereby ensuring the safe and stable operation of the arrester.

The invention provides a transient grounding current measurement and diagnosis device and method based on hollow mutual inductor cooperation. The transient grounding current measurement and diagnosis device comprises a mutual inductor module, a data acquisition and conversion module, a signal conditioning and protection module, a master control and storage module, a collaborative algorithm module, an intelligent trigger module, a power supply module, a communication and positioning module and a protective shell. According to the transient grounding current measurement and diagnosis device and method based on cooperation of the hollow mutual inductor provided by the invention, the full waveform of the transient grounding current can be accurately measured, the total underground lightning current can be accurately inverted, and the shunting condition of each grounding path of power equipment can be analyzed in real time; the health state of the grounding system is intelligently diagnosed, a specific fault grounding path is accurately positioned, and the capture rate and reliability of lightning stroke events are improved.

The invention aims to provide the rock plate curtain wall roof concealed lightning protection and lightning receiving system which is concealed between rock plates for lightning triggering and lightning receiving and prevents the rock plates from being broken due to lightning strokes and the construction method thereof. The system comprises a building main body and a plurality of rock plate pieces arranged on the building main body; the first frame is arranged on the upper surface of the building main body; the second frame is fixedly connected with the side surface of the building main body; each lightning receiving profile is connected with the first frame, and the upper part of each lightning receiving profile is provided with an extension section used for connecting and leading lightning; one end of the lightning triggering connecting piece is fixedly connected with one lightning receiving profile, and the other end of the lightning triggering connecting piece is fixedly connected with the second frame; the plurality of rock plate pieces are laid on the first frame, a spacing seam is formed between every two adjacent rock plate pieces, each lightning receiving profile is correspondingly arranged in the corresponding spacing seam, and the second frame is connected with a building main body through the lightning protection downlead in a grounding mode. The lightning protection device is applied to the technical field of building lightning protection.

The invention provides a high-voltage power transmission line lightning protection device based on an insulator, and relates to the technical field of high-voltage power transmission line lightning protection. In the device, the top of an insulator string is mounted on an electric tower, and a high-voltage transmission line passes through the bottom of the insulator string; the lightning rod is installed on the top of the insulator string. The lightning protection mechanism is detachably connected to one side of the insulator string, the bottom of the lightning rod is electrically connected to the lightning protection mechanism, and lightning current is led into the ground through the lightning protection mechanism or discharged through the lightning protection mechanism or cut off through the lightning protection mechanism. When lightning stroke occurs, lightning current is introduced into the lightning protection mechanism through the lightning rod. When the amplitude of the lightning current is small and the duration is short, the lightning current is smoothly discharged into the ground after passing through the lightning protection mechanism. When the amplitude of the lightning current is too large or lasts for a long time, the lightning current is discharged after passing through the lightning protection mechanism or the lightning guide channel is cut off through the lightning protection mechanism. As a whole, the device can cope with different lightning stroke conditions, and effectively reduces the lightning stroke risk.

The invention discloses a composite material lightning stroke dynamic ablation simulation method based on ABAQUS. The method comprises the specific steps that S1, an anisotropic composite material three-dimensional model is established; s2, applying lightning stroke current and heat flow load, setting a variable initial value at normal temperature, and calculating the pyrolysis degree, potential and temperature field of each node; s3, giving a grid deformation displacement load in a static ablation depth direction, and driving the nodes to move to simulate deformation; and S4, constructing an information transfer matrix, mapping a temperature update grid, and taking the update grid as a next electrothermal analysis initial material domain. According to the ABAQUS-based composite material lightning stroke dynamic ablation simulation method provided by the invention, flowing of a dynamic grid between different layers of an anisotropic composite material laminated plate is realized, and parallel coupling calculation of composite material temperature rise and surface ablation depression is realized.