377 results about "Lightning strike" patented technology

The invention provides a line arrester operation monitoring method and device based on bimodal synchronous analysis, and the method is applied to an operation monitoring device comprising a lightning stroke recognition module, a signal collection module and an operation diagnosis module, and specifically comprises the steps: recognizing a lightning stroke event; bimodal current waveform signal acquisition for synchronously triggering an impact current signal and a power frequency follow current signal; dynamically associating the bimodal current waveform signal based on the time dimension and the amplitude dimension; and establishing a correlation diagnosis model, and outputting an abnormality diagnosis result according to the correlated bimodal current waveform signal. According to the method, the dual-mode current waveform is synchronously collected and the dual-mode current waveform signal is dynamically associated, so that the recovery state of the line arrester after action is comprehensively and accurately mastered, the abnormal state of the line arrester is more accurately identified, the identification accuracy of potential fault hidden dangers is improved, the occurrence probability of misjudgment and missed judgment is reduced, and the reliability of the line arrester is improved. And the effectiveness and reliability of line lightning arrester monitoring are ensured.

The invention discloses a power transmission line lightning stroke risk assessment system and method and a storage medium, and the method comprises the steps: dividing a mountain and a flat ground region around the mountain into a plurality of extraction sections, and dividing the boundary of a mesoscopic terrain according to the cloud-to-ground lightning density variation coefficient of the extraction sections and the average cloud-to-ground lightning density variation coefficient of the flat ground region, dividing the range from the boundary of the mesoscopic terrain to the peak of the mountain into mesoscale terrains; according to the space electric field of the meso-scale terrain, establishing a meso-terrain lightning downlink pilot fractal development model, and carrying out simulation calculation on the model to obtain meso-terrain ground thunderbolt distribution; the mesoscopic terrain ground thunderbolt distribution serves as the ground lightning density of each area of the complex terrain, the power transmission line lightning trip-out rate of each area of the complex terrain is calculated according to the ground lightning density and the thunder observation data, and the lightning risk of each area of the complex terrain is evaluated through the power transmission line lightning trip-out rate. According to the invention, power transmission line lightning stroke risk assessment in a complex terrain region is realized in a more refined manner.

A lightning shielding failure risk assessment method for a power transmission line based on three-dimensional laser point cloud data includes reclassifying three-dimensional laser point cloud data of a power transmission corridor; acquiring lightning activity parameters for the power transmission corridor; determining wire, ground wire, and ground point cloud striking distances; plotting three-dimensional wire, ground wire, and ground shielding arc surfaces in the preprocessed three-dimensional laser point coordinate system; performing orthogonal projection of the plotted three-dimensional shielding arc surfaces to obtain two-dimensional exposed arc surfaces and determining the areas of the two-dimensional exposed arc surfaces; and looping to calculate the areas of the exposed arc surfaces at different lightning incidence angles and different lightning current amplitudes; and determining a line trip rate based on the lightning strike density, the lightning incidence angle probability distribution function, and the lightning current probability distribution function.

The invention relates to the technical field of meteorological monitoring, in particular to a ring main unit lightning micrometeorological online monitoring system and method, and the system comprises a feature extraction module, a frequency spectrum detection module, a frequency band pool screening module, a path adjustment module and an interference avoidance module. The method comprises the following steps: collecting an electric field intensity extreme value sequence, calculating a change rate difference ratio, identifying thunder and lightning precursor characteristics, combining a frequency spectrum energy density map, analyzing an energy peak frequency band and a drop point of a frequency hopping signal, judging a thunder and lightning frequency signal concentration area, performing frequency spectrum interference filtering, and combining a dynamic time warping algorithm. The time deviation between a lightning stroke time point and frequency hopping scheduling is analyzed; a frequency hopping path is adjusted in real time; the response timeliness is improved; the difference value before and after electric field disturbance is monitored; and support is provided for monitoring stability and response adaptability of the thunder and lightning risk environment.

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 blade lightning protection channel online test method and system based on a pulse current method, and belongs to the technical field of blade lightning protection detection.The method comprises the steps that a pulse waveform is generated through a pulse current generator to simulate lightning impulse, and the lightning impulse is injected into the surface of a lightning arrester of a blade lightning protection system; measuring channel currents at different positions of the surface of the lightning arrester in the length direction by using a distributed sensor; a high-voltage differential probe is used for collecting and measuring the waveform of an incident wave and the waveform of a reflected wave of an injection point; detecting blade surface potential distribution by using a capacitive coupling sensor; comparing the waveform of the incident wave, the waveform of the reflected wave and the theoretical waveform, determining a time domain reflection coefficient and a frequency domain impedance spectrum, and determining a fault type; after the fault type is determined, the fault point is positioned based on the channel current and the blade surface potential distribution, the lightning impulse is simulated through the pulse waveform, the lightning protection channel is further tested, shutdown is not needed, the testing efficiency of the blade lightning protection channel is effectively improved, and the power generation efficiency is ensured.

The invention discloses a thunder and lightning positioning method and system based on multi-source data fusion, and belongs to the technical field of thunder and lightning monitoring and positioning. The method comprises the following steps: in a preset time window, collecting first and second arrival time of a lightning event received by each ground lightning detection device, and calculating the arrival time difference; and extracting a lightning detection distance, a capture time difference and an observation included angle in combination with the lightning area image, obtaining an electric field change rate, a radar reflectivity and an equipment distance, substituting into a combined lightning positioning formula, and calculating a space distance between a lightning striking point and the first receiving equipment. Through the position information of the equipment, the geographical coordinate of the lightning striking point is calculated. According to the scheme, the spatial resolution and accuracy of lightning positioning can be effectively improved, positioning errors caused by a traditional radar or single-point monitoring method are reduced, simultaneous positioning of a plurality of lightning striking points is supported, and accurate data support and spatial decision basis are provided for subsequent lightning risk early warning, power equipment protection and disaster traceability.

The invention relates to the technical field of composite material lightning protection, in particular to a pyrolytic dynamics simulation analysis method for lightning stroke damage of a carbon fiber composite material. According to the technical scheme, the method comprises the following steps that a new model is established in ABAQUS / CAE, a carbon fiber composite material is established, a laminated plate laying layer is defined, a multi-physical field analysis step is set, load current density is applied to a lightning stroke action area, the pyrolysis behavior of the carbon fiber composite material under lightning stroke high Joule heat is simulated based on a pyrolysis kinetic model, and operation is established in a Job module. And parallel computing parameters are selected and submitted for solution, temperature field distribution is checked, and the current density diffusion trend is verified. Through the electric-thermal-structure coupling model, the conductivity gradient design and the lightning arc model, refined prediction of CFRP lightning stroke damage is achieved, the damage area is reduced, the lightning stroke process is accurately simulated, and the adaptation and protection effects on the lightning stroke environment are improved.

The invention discloses an overhead line-high voltage cable sheath lightning stroke induced voltage calculation method. At present, the voltage of a lightning stroke point, a connection point of an overhead line and a cable and a point in a well of each joint along a cable sheath cannot be obtained at the instantaneous moment of lightning stroke of the overhead line on site. According to the method, electromagnetic transient simulation modeling is carried out on actual spatial positions, structural parameters and material parameters of field overhead lines and high-voltage cables, electromagnetic transient simulation modeling is carried out on lightning currents, electromagnetic transient modeling is carried out on normal operation conditions and actual lightning stroke fault conditions of an electric power system, and after the randomness of the fault occurrence moment is considered, the electromagnetic transient simulation modeling is carried out on the actual lightning stroke fault conditions of the electric power system. And the maximum lightning stroke induced voltage value of each point along the cable sheath after lightning stroke is calculated through electromagnetic transient simulation software, so that a reference basis is provided for insulation matching design of the cable sheath of the overhead line-cable mixed line invaded by lightning current, and a foundation is laid for design evaluation of various subsequent voltage limiters and protectors.

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 discloses a lightning stroke attachment point calculation method of a complex surface flat plate structure, and aims to overcome the defects of an existing lightning stroke attachment point numerical calculation method, and on the basis that finite element software is utilized to construct a typical needle plate model based on an electric field model method, an electrode is moved downwards to simulate the thunder and lightning development process under first guidance. A pilot / corona onset criterion is established based on short-gap discharge and material corona discharge theories, a numerical simulation algorithm is provided for evaluating the lightning protection design of a complex surface flat plate structure, the determination accuracy of the attachment points of the flat plate structure with similar surface material conductivity, complex surface microstructure and no salient points is improved, the attachment point simulation algorithm is optimized, and the method is suitable for application and popularization. And tedious and high-cost test links are effectively avoided.

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 field of power systems, and discloses an intelligent power transmission line lightning stroke characteristic intelligent identification online monitoring method comprising the following steps: collecting multi-source data, preprocessing, modeling lightning stroke probability and spatial distribution by using a chaos dynamics model, extracting and classifying characteristics based on deep learning, and optimizing a prediction strategy in combination with reinforcement learning. Real-time early warning and automatic response are achieved; the invention also provides an intelligent transmission line lightning stroke characteristic intelligent identification online monitoring system. The system comprises a data acquisition module, a data processing module, a chaotic dynamics modeling module, a deep learning identification module, a reinforcement learning optimization module and an early warning and response module. According to the method, the real-time collection and preprocessing technology of multi-source data is adopted, data cleaning and standardization are carried out in combination with multi-dimensional information such as meteorological, electrical and historical lightning stroke data, the accuracy and consistency of the data are ensured, and the reliability of a prediction result is effectively improved.

The invention discloses a resistance-reducing grounding mechanism and an optimization method thereof.The resistance-reducing grounding mechanism comprises a grounding pile foundation, a grounding resistance-reducing cage, a grounding down lead and a corrugated external conductor wire, the grounding pile foundation is vertically buried underground, the grounding resistance-reducing cage wraps the grounding pile foundation in the horizontal dimension and the vertical dimension, and the grounding down lead is connected with the corrugated external conductor wire; the grounding down lead extends downwards from the ground to be connected to the grounding resistance reduction cage, and the corrugated external conductor wire is attached to the grounding resistance reduction cage. Therefore, the spatial three-dimensional wrapping design of the grounding resistance reduction cage can realize uniform diffusion in a larger range, the current diffusion capability of the grounding mechanism is improved, the external conductor wire with the corrugated structure increases the effective length and the surface area of the conductor, and the current diffusion capability of the grounding mechanism is further improved; and the grounding resistance reduction cage and the corrugated external conductor wire form a multi-layer conductive channel, so that the current discharge speed can be further increased, the grounding resistance value is reduced, and the transient overvoltage during lightning stroke is reduced, thereby ensuring the safe and stable operation of a power system.

The invention relates to the technical field of hydropower station lightning protection, and relates to a hydropower station power transmission line lightning stroke risk assessment method comprising the following steps: based on power transmission line tower footing types and position information, combining a preset height threshold to divide lightning stroke types, and marking high-risk candidate tower footing according to protection range parameters of a lightning suppressor; operating parameters and overvoltage monitoring data of the lightning suppressor are collected in real time, environmental factors and tower footing insulation configuration differences are fused, and a tower footing correlation model is constructed; carrying out vulnerability evaluation on the high-risk candidate tower footing by adopting the tower footing type correction coefficient; constructing a lightning stroke risk assessment model for the tower footing exceeding the preset height threshold, optimizing risk assessment model parameters by using the overvoltage monitoring data, and generating a risk assessment result; and correcting protection range parameters according to lightning stroke event feedback, and iteratively updating the risk assessment model in combination with historical operation data of the lightning suppressor. Lightning stroke risk assessment of the whole hydropower station power transmission line is realized, and lightning stroke risk assessment efficiency and accuracy are improved.

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 discloses an offshore wind plant lightning arrester annual failure rate evaluation method considering lightning randomness, and belongs to the field of offshore wind plant lightning protection, and the method comprises the following steps: S1, determining easy-to-out-of-limit electrical parameters; s2, based on the easy-to-out-of-limit electrical parameters, calculating the failure probability of the lightning arrester under single lightning stroke; s3, obtaining a lightning current amplitude cumulative probability; s4, obtaining a lightning arrester interval failure probability considering the lightning current amplitude cumulative probability; and S5, calculating the annual lightning stroke failure rate of the lightning arrester of the offshore wind plant based on the interval failure probability of the lightning arrester by considering the lightning inducing area of the fan of the offshore wind plant. According to the offshore wind plant lightning arrester annual failure rate evaluation method considering lightning randomness, lightning randomness is introduced, failure quantitative calculation and multi-parameter comprehensive analysis are achieved, lightning arrester model selection is supported, and technical upgrading of offshore wind plant lightning arrester reliability analysis from qualitative analysis to quantitative analysis and from theory to application is completed.

A method is presented for determining a likelihood of an ignition hazard. The method comprises receiving a current waveform for a lightning strike event at a conductive member that forms an interface with a decomposable member. Material parameter inputs for the conductive member and the decomposable member are received. Based at least on one or more of the received material parameter inputs and an energy from the current waveform, a heating of the decomposable member is resolved, and a quantity of volatiles within the interface volume are determined. A total pressure generation within the interface volume is determined. A probability of ignition hazard by the lightning strike event is output based on a comparison of the total pressure generation and a containment pressure threshold for the interface volume.

The utility model particularly relates to a base station which comprises a data center module, an external connection structure and a vertical rod structure. The external connection structure is arranged on the data center module, and the external connection structure is electrically connected with the data center module. The external connection structure is arranged at one end of the vertical rod structure and electrically connected with the vertical rod structure. The vertical rod structure is a conductor and is provided with a grounding site, and the grounding site is used for grounding. According to the utility model, the data center module is grounded through the vertical rod structure, the grounding site can be in direct contact with the ground and can also be connected with an external ground wire, the grounding function of the reference station is realized, and when the reference station is struck by lightning, current is rapidly conducted to the ground through the vertical rod structure, thereby reducing the potential difference in the data center module and improving the reliability of the data center module. Destructive voltage is prevented from being generated, and the risk that electrical components in the data center module are damaged by lightning stroke is effectively avoided. The problem that internal electrical components are easily damaged when the reference station encounters lightning stroke in the prior art is solved.

The invention discloses an overhead transmission line lightning stroke risk early warning method and device and a medium. The method comprises the following steps: training a pre-constructed neural network based on historical data of a lightning stroke event of the overhead transmission line, and generating a lightning current amplitude prediction model; based on the lightning current amplitude in the historical data, constructing a lightning current amplitude probability distribution function of each region; obtaining input data of lightning current amplitude prediction through meteorological thunderstorm data and numerical weather forecast data; inputting the input data into a lightning current amplitude prediction model, obtaining a predicted lightning current amplitude, inputting the predicted lightning current amplitude into a corresponding lightning current amplitude probability distribution function, and determining a lightning current amplitude probability; and determining a lightning trip-out rate of the overhead transmission line according to the predicted lightning current amplitude and the lightning current amplitude probability in combination with the transmission line data, and determining a lightning flashover risk early warning level of the transmission line according to the lightning trip-out rate.

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 present invention belongs to the technical field of high-voltage lightning strike fault prevention, and more specifically, relates to a lightweight lightning image instance segmentation method. The method includes: First, obtain lightning images existing in the target area during thunderstorms and clean them, removing images that do not meet the conditions, and the remaining images should have moderate exposure; Then, input the cleaned lightning image data into the YOLO-lightning network model to perform instance segmentation on the lightning image data; Finally, output the contour information of the lightning to be recognized in the image. The present invention solves the problems of insufficient accuracy and limited feature extraction ability in the instance segmentation of complex-shaped targets in the prior art.

The invention discloses a lightning stroke protection method, device and equipment, a medium and a product. The method comprises the following steps: acquiring real-time thunder and lightning related data of a target facility; inputting the real-time lightning related data into a lightning stroke probability prediction model obtained through federal learning training to obtain a lightning stroke probability prediction result; determining a lightning stroke intensity prediction result according to the real-time lightning related data and a pre-trained lightning stroke intensity prediction model; according to the lightning stroke probability prediction result and the lightning stroke intensity prediction result, determining a lightning stroke risk level; and adjusting the lightning protection strategy in response to the change of the lightning risk level. According to the technical scheme of the embodiment of the invention, the prediction capability of the electric power facility on the lightning stroke degree and the lightning stroke protection flexibility 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 relates to the technical field of emergency plan planning, and provides a lightning protection device emergency plan planning system based on transformer substation grounding grid faults, a data collection module collects historical data and real-time data of a transformer substation, and a prediction module constructs a grounding grid corrosion prediction model based on soil environment parameters in the historical data. A thunderstorm probability prediction model is generated based on radar meteorological data, a real-time risk assessment module establishes a grounding grid lightning stroke risk association model based on prediction results of the two models, and the lightning stroke risk of the current grounding grid is judged according to real-time data; the emergency plan planning module plans an emergency plan corresponding to the lightning stroke risk based on the lightning stroke risk in combination with a built-in standard plan; the thunderstorm risk association model is constructed by combining the prediction results of the linear regression model and the logistic regression model, and the emergency plan planning module plans the emergency plan according to the thunderstorm risk association model, so that the whole-course control of the lightning stroke risk of the transformer substation from prediction to the emergency plan is realized, and the stable operation of a power grid is ensured.

The embodiment of the invention provides an impact current waveform parameter generation method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring historical lightning stroke parameters; according to the historical lightning stroke parameters and preset topological data, constructing a lightning overvoltage simulation model; executing a simulation operation through the lightning overvoltage simulation model to obtain first internal lightning stroke data of the lightning arrester under different lightning back striking working conditions and second internal lightning stroke data of the lightning arrester under different lightning shielding failure working conditions; and obtaining a plurality of lightning arrester current waveform parameter ranges according to the first internal lightning stroke data and the second internal lightning stroke data. According to the method, the historical lightning stroke parameters and the preset topological data are used for constructing the model for simulation, the influence of different lightning invasion paths on the lightning arrester is comprehensively considered, compared with simulation of a single working condition, the generated waveform parameter range is more accurate, and a more accurate basis is provided for lightning protection design and analysis of a power system.

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 relates to the technical field of surge protector safety monitoring, in particular to an intelligent surge protector monitoring method, which comprises the following steps that: a monitoring system executes initialization self-inspection; the monitoring system executes electric leakage demagnetization protection, and the short-circuit coupling mutual inductor carries out demagnetization; the monitoring system collects the leakage current signal and carries out filtering processing, identifies the cracking degree and determines the failure level; the monitoring system captures lightning stroke overcurrent transient current signals, records signal parameters and evaluates the lightning stroke tolerance of the surge protector; the monitoring system continuously tracks the state of the three-phase voltage signal and executes overvoltage logic judgment; whether a protection ground wire is connected or not is judged according to the pin level state of the ground loss state detection circuit; a detacher is arranged, and whether the detacher is in an unhooking state or not is judged; and the temperature change of the terminal strip is detected through the temperature sensor. According to the invention, on-line monitoring can be carried out on the surge protector in real time, and fault monitoring of a leakage current detection circuit, lightning stroke over-current detection, overvoltage detection, ground loss detection, unhooking detection and the like can be completed.

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.

The utility model discloses a multipath lightning stroke current monitoring circuit and device, the monitoring circuit comprises at least one sampling circuit and a single-chip microcomputer, one end of each sampling circuit is externally connected with a Rogowski coil mutual inductor, and the other end of each sampling circuit is connected with the single-chip microcomputer through an A / D converter; the sampling circuit is used for receiving a differential voltage signal output by the Rogowski coil mutual inductor for collecting lightning current, performing sampling, secondary filtering and integral reduction on the differential voltage signal, and outputting a final sampling signal; wherein the sampling circuit comprises an acquisition circuit, a first-stage filter circuit, a voltage following circuit, an integrating circuit and a second-stage filter circuit which are connected in sequence. According to the utility model, multi-path lightning stroke current monitoring can be realized, monitoring objects are more, and installation is convenient and flexible.