712 results about "Thunderbolt" patented technology

The invention provides a lightning protection system effectiveness evaluation method and system based on multi-dimensional research and judgment, and relates to the technical field of lightning protection, and the method comprises the steps: collecting system index data through a bidirectional feature extraction network, employing a separable convolution layer with an attention mechanism and multi-scale Fourier transform to extract features, and carrying out the analysis of the features; an index transfer function is constructed in combination with a causal reasoning network, evaluation grade division is performed by adopting kernel principal component analysis and density clustering, and system parameters are optimized through a hierarchical reinforcement learning framework, so that accurate evaluation and dynamic optimization of the state of the lightning protection system can be realized, and the reliability and the protection effect of the system are improved.

The invention provides a distribution network lightning arrester transient temperature distribution improvement method based on insertion of an aluminum gasket, and belongs to the technical field of electrical equipment, and the method comprises the steps: constructing a lightning arrester three-dimensional model in simulation software; constructing the lightning arrester conductivity of the coupling temperature; constructing a lightning stroke simulation model of the lightning arrester; lightning stroke transient temperature distribution of the lightning arrester is obtained, and a lightning stroke comparison result before and after addition of the aluminum gasket is obtained; constructing an aluminum gasket thickness-position set; and obtaining the position-thickness optimization relation of the aluminum gasket, constructing a genetic algorithm model according to the aluminum gasket thickness-position set, and obtaining the optimal aluminum gasket thickness based on the position. The method has the advantages that the temperature change of the ZnO valve plate of the lightning arrester under the lightning impulse is obtained, and the transient temperature distribution of the lightning arrester during the lightning impulse is obtained by using the temperature distribution coefficient; comparing the transient temperature distribution of the lightning arrester before and after adding the aluminum gasket to confirm that the temperature distribution of the lightning arrester can be optimized by adding the aluminum gasket; therefore, the method for introducing the aluminum gasket between the lightning arrester valve plates is provided.

The invention discloses a railway LEU-transponder transmission system lightning stroke fault risk assessment method, and the method comprises the steps: determining a lightning current invasion path through building a lightning stroke transient electromagnetic disturbance calculation model of an electromagnetic sensitive equipment port, and calculating the voltage and current at the port when incoming waves invade. And building an electromagnetic sensitivity test experiment platform of the railway signal system based on the lightning current invasion path and the voltage and current at the port. And performing label category prediction on the to-be-predicted sample point through each support vector machine model in the target model set, and voting each prediction result. According to the invention, a complex transmission relation between lightning transient electromagnetic disturbance and equipment failure risk is established through deep learning. The fault risk of the signal system under the lightning transient electromagnetic disturbance action is predicted through transient electromagnetic effect experimental data of real equipment of the railway signal system, and powerful support is provided for improving the electromagnetic sensitivity of the signal system and guaranteeing stable operation of a railway.

The invention discloses a lightning protection system for an environment monitoring station and a use method of the lightning protection system, and relates to the technical field of lightning protection, and the system comprises a multi-stage composite grounding module, an intelligent energy distribution module, a lightning current monitoring module, a surge protection module and a grounding impedance optimization module. Comprising a main grounding body, an auxiliary grounding body and a deeply-buried grounding electrode, the grounding resistance can be remarkably reduced, the lightning current leading-in efficiency can be improved, when lightning current passes through, the multi-stage grounding structure can effectively disperse the current, overload of a single grounding body is avoided, and meanwhile the grounding resistance of the grounding body is improved. The intelligent energy distribution module can dynamically adjust a current distribution strategy between different grounding bodies according to the magnitude of lightning current, ensures that the deeply-buried grounding electrode is preferentially conducted under the condition of strong lightning stroke, starts a parallel discharge mode of the main grounding body and the auxiliary grounding body under the condition of weak lightning stroke, and guarantees the safe operation of the environment monitoring station.

The invention relates to the field of resource allocation, and discloses a wind power plant blade lightning protection detection unmanned aerial vehicle task scheduling and path optimization management method, which is used for improving the efficiency, safety and economy of wind power plant blade lightning protection detection. Comprising the steps of generating a dynamic risk tag and sorting a task queue based on a fan spacing topological relation, a blade grounding resistance annual degradation rate and a real-time lightning early warning level, outputting a detection work order with a time window in combination with the residual electric quantity of the unmanned aerial vehicle and a return distance, and calculating a unit time cost derivative by adopting a fractional order differential equation, and dynamically regulating and controlling the deployment density of the unmanned aerial vehicle cluster, constructing a three-dimensional composite potential field containing the lightning rod safety radius in the digital elevation model, monitoring the deviation between the actual detection cost and the predicted value in real time, and dynamically adjusting the work order priority based on the enterprise risk coefficient. According to the method, dynamic risk assessment, cost optimization, obstacle avoidance planning and intelligent decision making are integrated, and the timeliness, economical efficiency and reliability of wind power plant blade lightning protection detection are remarkably improved.

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 relates to the technical field of thunder and lightning signal sampling, and discloses a GAN-based thunder and lightning very-low-frequency electromagnetic wave signal up-sampling method, a terminal and a medium. The method comprises the following steps: preprocessing a lightning very-low-frequency low-sampling signal and a real high-sampling signal; constructing a generative adversarial network; the generator is used for extracting initial features from the low-sampling signals and performing residual enhancement, then mapping low-sampling features after residual enhancement to a high-sampling dimension through a feature-guided dynamic interpolation mechanism, and performing correction and signal mapping on intermediate features after interpolation to obtain reconstructed signals matched with a target high-sampling rate; the discriminator is used for reconstructing the authenticity probability of the signal; after a generator and a discriminator are jointly trained by adopting an alternative updating mode of discriminator loss and generator loss, a newly input low sampling signal is preprocessed, and a corresponding reconstruction signal is output through the generator. According to the invention, accurate reconstruction from a lightning very-low-frequency low-sampling signal to a high-sampling signal is realized.

The metasurface array antenna housing comprises a plurality of array units of the same structure, each array unit sequentially comprises a first lightning protection layer from top to bottom, and each first lightning protection layer comprises four copper metal cylinders and a lightning protection top layer drainage metal patch; the second metasurface wave absorbing and transmitting layer comprises a first dielectric substrate, and four quasi-rectangular patches, four lumped resistors, four quasi-triangular patches and four quasi-square rings which are arranged on the upper surface of the first dielectric substrate; the third metasurface wave-transparent layer comprises a square metal patch, and a first circular ring and a second circular ring are etched on the square metal patch. Lightning is guided to the third metasurface wave-transparent layer through the first lightning protection layer, the lightning is conducted to other areas through the metal patch, damage of the lightning to the antenna housing is effectively avoided, and the antenna housing can directly replace a lightning protection strip for use; the structural size is greatly reduced, the angle stability is improved, and integration is facilitated; the copper-clad surface of the third metasurface wave-transparent layer can be used as a metal back plate of the second metasurface wave-absorbing layer, and structural multiplexing is achieved.

The invention discloses a real-time thunder and lightning positioning method. A plurality of observation station GNSS (Global Navigation Satellite System) synchronously acquire thunder and lightning signals to obtain waveform data; performing FFT band-pass filtering and denoising processing on the lightning signal waveform data; a sliding window dynamic threshold is adopted to extract peak value characteristics, peak value characteristics (tp, Ap and Wp) of a waveform in different time windows are obtained, a local noise standard deviation is calculated, only an effective peak value is reserved, and real-time return of lightning data is realized while positioning precision is ensured. The calculation center reconstructs the waveform based on the peak value characteristics (tp, Ap, Wp), the reconstructed waveform more accurately reflects the characteristics of the lightning signal, and the time delay measurement error caused by signal distortion is reduced. And calculating the mutual correlation of the reconstructed lightning waveform data of every two observation stations, extracting the maximum correlation time delay, calculating a TDOA equation set by adopting a weighted nonlinear least square method according to the signal time delay information, and outputting a three-dimensional lightning positioning result. And evaluating the reliability of the positioning result through residual analysis and geometric accuracy factors.

The utility model discloses an automated equipment connected with a horizontal glass washing machine, comprising: a washing machine, a transport device and a lasagna rack; the transport device, wherein a lifting device and a lasagna rack flipping module are arranged at the bottom of the transport device, the transport device is arranged at one side of the washing machine, the transport device comprises a material taking Z-axis module, and a material taking X-axis module is arranged on the material taking Z-axis module. The automated equipment connected with the horizontal glass washing machine of the utility model can automatically put the glass on the lasagna rack into the washing machine for washing through the cooperation between the transport device, the lifting device and the lasagna rack flipping module. Therefore, in this design, manual operation only needs to be performed by pushing in / out the lasagna rack, and the subsequent suction, delivery and flipping are all automated operations, eliminating the manual delivery action, which can save labor costs and improve efficiency and yield.

The invention relates to an external multi-gap lightning arrester volt-second characteristic curve estimation method and device and a medium, and the method comprises the steps: selecting at least two different standard lightning pulses to carry out the lightning stroke test of an external multi-gap lightning arrester test system, and obtaining an initial initial voltage and a corresponding initial lightning stroke damage effect value; constructing each standard lightning pulse voltage-time curve, obtaining a damage effect integral function, and obtaining an initial external multi-gap lightning arrester voltage-time curve in combination with the initial initial voltage and the initial lightning damage effect value; based on the initial voltage-time curve of the external multi-gap lightning arrester, parameter optimization is carried out by utilizing a genetic algorithm, the voltage-time curve of the external multi-gap lightning arrester is obtained, and equipment and a medium are used for realizing the method. Compared with the prior art, the method has the advantages that the volt-second characteristic curve of the external multi-gap lightning arrester is directly estimated by using the genetic algorithm, and the characteristic curve capable of accurately reflecting the influence of the lightning stroke on the power distribution network is obtained through a simple estimation method.

The utility model discloses an anti-thunder filtering electric connector, which comprises a metal shell, an input end contact element, a filtering capacitor, an output end lead, a transient suppression diode and a printed board, and is characterized in that the filtering capacitor is a plate-type capacitor which is arranged in the metal shell; the plurality of input end contacts respectively pass through a plurality of inner electrode through holes of the plate-type capacitor and a plurality of corresponding through holes on the printed board, the plurality of transient suppression diodes are respectively installed on the printed board, and one ends of the transient suppression diodes are respectively in conductive connection with the plurality of input end contacts. The other ends of the plurality of transient suppression diodes are respectively and conductively connected with the inner wall of the metal shell, and the inner ends of the plurality of input end contacts are respectively and conductively connected with the inner ends of the plurality of output end leads. The utility model has the functions of filtering, lightning protection and electric connection at the same time, the product integration level is very high, the volume and the weight are reduced, a lightning protection circuit module does not need to be added in a post-stage circuit module during application, the design and the production of the whole machine are facilitated, and the production efficiency of the whole machine is improved.

The present application relates to lightning monitoring and strategy optimization technical field, especially a kind of lightning detection station layout method and system based on intelligent optimization algorithm.The site coordinates are used as the initial population satisfying the site position constraint of solution generation, and the individual corresponding to solution is 3N-dimensional vector, corresponding to the three-dimensional coordinates of N sites;Then population iteration is carried out through population mutation, crossing.This application can maintain the higher diversity of individual in the process of individual mutation, and randomly selects multiple parent individuals for mutation.Although the convergence speed is slow in high-dimensional, multi-peak experimental environment, it has stronger global search ability and the advantage of avoiding local convergence.The present application solves the problem that lightning positioning site distribution cannot consider terrain and cannot guarantee detection efficiency and accuracy in the prior art.

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 relates to the technical field of thunder and lightning signal identification, and discloses a thunder and lightning time sequence signal identification method based on an improved Transform, a terminal and a medium. The method comprises the following steps: acquiring an original lightning electric field time sequence signal and carrying out signal preprocessing to generate a plurality of lightning time sequence fragments; screening out key time sequence fragments containing lightning radiation pulses from the plurality of lightning time sequence fragments; taking each key sequence fragment as one-dimensional time sequence data of a single channel, inputting the key sequence fragments into an improved Transform neural network model, and outputting a corresponding lightning discharge type identification result; the model comprises a down-sampling convolution module, a position encoding module, a multi-layer Transform encoder and a category output module. According to the method, subtle relations in the lightning signals are deeply mined, more robust feature support is provided for classification tasks, and the method has better universality, so that the discharge types of the lightning signals are efficiently identified.

The invention discloses an overhead transmission tower lightning current monitoring system and method, and the method comprises the following steps: installing a multi-mode sensor module on a tower, and collecting a lightning current signal and structure response data; utilizing a local sparse dynamic window optimization algorithm to process the data segment by segment, extracting dynamic features and generating a multi-scale feature map; modeling a lightning stroke propagation rule through a space-time generative adversarial network, and generating a space-time characteristic matrix; constructing a spatial correlation map by combining a hypergeometric map embedding algorithm, and identifying a lightning stroke influence range and a diffusion path; dynamically adjusting a communication path and frequency distribution by adopting a Bayesian game optimization model; analyzing the potential influence of lightning stroke on the structure based on a multi-task self-supervised learning model, and predicting a time evolution trend; and comprehensively evaluating real-time and historical data through the remote monitoring terminal, and generating a risk prediction report and a protection reinforcement strategy. According to the invention, the problems of real-time performance, accuracy and environmental adaptability of lightning current monitoring are solved.

The utility model relates to a transformer ascending flanged base explosion-proof structure, and belongs to the technical field of transformer manufacturing. According to the technical scheme, a middle barrel (21) and a lower barrel (22) are connected in a welded mode through an annular transformer ascending flanged base pressure releasing plate (16), and an inner ring of the transformer ascending flanged base pressure releasing plate (16) is connected with the top of the lower barrel (22) through a second transformer ascending flanged base pressure releasing plate welding seam (18); an outer ring of a transformer ascending flanged base pressure release plate (16) is connected with the bottom of the middle barrel (21) through a transformer ascending flanged base pressure release plate welding seam I (17); and an arc-shaped transformer ascending flanged base explosion-proof protection plate (8) is arranged outside the lower cylinder body (22) and covers the middle cylinder body (21) and the transformer ascending flanged base pressure release plate. The explosion-proof device has the beneficial effects that the explosion of the transformer ascending flanged base caused by thunder, lightning, short circuit and the like can be greatly reduced, so that the loss caused by the explosion is reduced, and the safety of workers is protected.

The invention relates to the technical field of lightning protection, and discloses a natural gas station lightning protection monitoring method. The method comprises the following steps: acquiring electric field and equipment state data in real time by using a triangular networking electric field instrument and a multi-type sensor; performing time-frequency domain decomposition on the data, and constructing a feature library containing historical experience; then, fusing physical model calculation and historical mode matching, and generating a lightning current predicted value; an early warning threshold value is adjusted according to the health state of the equipment, and accurate early warning is achieved; according to the method, a physical rule formed by thunder and lightning is combined with a historical data driven mode, meanwhile, the influence of the equipment state on early warning is considered, the problems that a traditional method is low in prediction precision and poor in equipment linkage performance are solved, and the method is suitable for popularization and application. And a dynamic and accurate thunder and lightning protection scheme is provided for the natural gas station.

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 field of electronic material technology and lightning protection, in particular to an all-metal progressive impedance edge scattering control material compatible with lightning protection. The passive protection method based on the Faraday cage concept is applied to lightning stroke protection of a typical edge scattering suppression structure, the surface of the edge scattering suppression structure is covered with the whole full-covering periodic hollow full-metal membrane, and the gradual hollow metal sheet is formed by carving a gradual change hole unit structure on the metal sheet. Therefore, the propagation characteristic of the electromagnetic wave on the metal surface is changed, and the electromagnetic wave adjusting effect is achieved. According to the invention, no negative influence is generated on the original electrical performance, strong lightning protection is compatible, and lightning current injected into a target body can be efficiently guided away, so that the lightning current smoothly flows into a conductor to well protect a wave-absorbing material below the conductor, and a good lightning protection effect is achieved. The method is simple in process, high in operability, easy to implement industrially and suitable for popularization.

The invention discloses a modeling method and device for a lightning current waveform curve, terminal equipment and a storage medium, and belongs to the field of lightning current waveform modeling, and the method comprises the steps: constructing a plurality of initial node vectors through taking a fold point, a curvature extreme point and an inflection point of a lightning current waveform curve to be modeled as feature points, and employing a B-spline algorithm to obtain a plurality of initial node vectors; generating a fitting curve of each initial node vector; calculating a fitting error of the fitting curve according to the lightning current waveform curve; taking the plurality of initial node vectors as a plurality of initial populations, carrying out iterative optimization operation on the plurality of initial populations according to the fitting error, and carrying out dynamic optimization on the populations in a mode of deleting, adding or combining feature points in each round of iterative optimization operation until a target population is determined; and finally, according to the feature points in the target population, constructing a target model of the lightning current waveform curve. The defect that a traditional lightning current waveform modeling method is difficult to meet the modeling requirement of complex lightning current waveforms is overcome.

The invention relates to the technical field of data processing, in particular to a thunder and lightning monitoring method and device, electronic equipment and a storage medium. The method comprises the steps that environment information such as air ion concentration of a current area is collected in real time, lightning influence data can be accurately determined, then the lightning occurrence probability in the current period is predicted based on the data, timely and accurate lightning early warning can be provided, relevant departments and the public are helped to take precautionary measures in advance, and the early warning efficiency is improved. The loss caused by lightning disasters is reduced, and a detailed monitoring report is generated for subsequent analysis and research, so that the accuracy and efficiency of lightning monitoring and early warning are improved.

The invention provides a lightning protection device current leakage detection method and system, and the method comprises the steps: firstly determining equivalent uniform field response signals corresponding to a rotating electromagnetic field at different rotating moments, and dividing the surface of a lightning protection device into a plurality of current detection blocks; the field intensity coupling relation between the surface of the lightning protection device and the detection probe in the detection probe array is determined according to the equivalent uniform field response signal corresponding to the rotation moment; determining a current density inversion field of the surface of the lightning protection device at the rotation moment by combining the frequency domain characteristics of the equivalent uniform field response signal corresponding to the rotation moment through a field intensity coupling relationship; and generating a current density topological graph of the leakage current of the lightning protection device based on all the density inversion fields, and positioning the leakage current position of the lightning protection device according to a current density abnormal region in the current density topological graph. By adopting the scheme of the invention, the influence of the complex geometric structure of the lightning protection device on the space positioning of the surface leakage current can be reduced.

The invention discloses a thunder and lightning arrester arrangement method and system for plateau wind turbine blades, and relates to the technical field of wind power generation, the method considers thunder and lightning arrester arrangement of wind turbines of different models and styles, so that the method can adapt to all wind turbines including three blades (such as multiple blades, spiral blades and other special-shaped blades); the lightning arresting simulation is carried out through the actually obtained lightning meteorological data, the next lightning arresting position is updated by continuously removing the lightning arresting position obtained through iteration in the previous step, the latest position of the lightning arresting point can be dynamically adjusted according to the number of lightning arresting times obtained through calculation of the current time of the blade, and judgment through prior experience is not needed. And finally, the minimum number of the lightning arresters is further pressed through global optimization, so that redundant arrangement of the lightning arresters is prevented, the arrangement cost can be reduced while comprehensive lightning arresters are ensured, and the dynamic balance influence of the lightning arresters on the blades is reduced.

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 relates to the technical field of SPD lightning protection, in particular to an intelligent SPD lightning protection detection system. The system comprises a data acquisition module used for acquiring leakage current, voltage and temperature of a piezoresistor; the lightning protection analysis module is used for analyzing the dispersion degree of the leakage current of the piezoresistor and the change trend of the leakage current, and determining the damage degree of the piezoresistor in combination with the temperature range of the piezoresistor and the dispersion degree of all elements in the leakage current coupling sequence; the method comprises the following steps of: analyzing the complexity and the voltage change trend of abrupt change data in the voltage of the varistors, and combining the similarity of the voltage change trends between the varistors connected in parallel to determine the voltage anomaly of the varistors; and the lightning protection detection module is used for judging the lightning protection detection precision at the current moment. According to the invention, the problem that the SPD lightning protection detection system cannot prevent lightning surge and power frequency voltage from damaging electrical equipment is solved, and the reliability of the SPD lightning protection detection system is improved.

The invention relates to the technical field of thunder and lightning monitoring and protection, in particular to a thunderbolt positioning and energy analysis method and system based on a lightning rod monitoring network. The method comprises the following steps: collecting and verifying a lightning current waveform and a microsecond timestamp in real time, and measuring grounding resistance regularly; the terminal carries out filtering analog-to-digital conversion on the signal and extracts characteristic parameters, after packaging, the priority is set according to the current amplitude, and the priority is uploaded to the cloud platform; the cloud platform is associated with multi-terminal synchronous data, when the number of effective terminals is not less than three, coordinates of a thunderbolt point are calculated, integral operation is performed on a lightning current waveform in combination with actually measured grounding resistance to quantify single-time lightning stroke energy, and historical data are analyzed by using a long-short-term memory network model to realize equipment health diagnosis and life prediction. And displaying the thunderbolt point distribution thermodynamic diagram and the state evaluation report through a visual interface. According to the invention, the whole process management from data acquisition to intelligent decision making is realized, and the accuracy and predictability of lightning monitoring and protection are improved.

The invention relates to a power supply wall box with strong electromagnetic pulse combined protection and high shielding effectiveness, which belongs to the technical field of electronic equipment shielding square cabins and comprises a shell, an out-cabin panel, an in-cabin panel, a power supply lightning protection device and a combined filter. An out-cabin panel is installed at one end of the shell, an in-cabin panel is installed at the other end of the shell, and the shell is fixed to a cabin plate of the square cabin. And a plurality of connector sockets are arranged on the panels outside and inside the cabin in a one-to-one correspondence manner to form a plurality of groups of power interfaces. The plurality of combined filters are mounted on a mounting plate in the shell, the combined filters are connected in series in a power supply loop of a group of connector sockets, and the power supply lightning protection devices are mounted on an out-cabin panel and are connected into the power supply loop of the corresponding group of connector sockets. Through the integrated design of lightning protection, HEMP protection and EMI filtering of the square cabin power supply, and in cooperation with the structural design of the wall box, the problems that an existing square cabin wall box is single in protection function and does not have the lightning protection function, the HEMP protection function and the high shielding effect at the same time are solved.

According to the lightning counterattack prevention system for the unmanned aerial vehicle nest on the power transmission line iron tower, the nest shell is in insulated connection with the iron tower, the voltage generated when lightning current is discharged to the nest can be directly reduced, the counterattack probability is reduced, meanwhile, a grounding terminal is arranged in a matched mode, the shell is directly connected with a down lead of an iron tower footing, and if redundant lightning current exists, the lightning counterattack probability is reduced. And the down lead is continuously released, so that the safety of the nest is ensured.

The invention discloses an overhead ground wire non-outage direct current deicing method, medium and system, and the method comprises the steps: determining the length of an overhead ground wire section to be deiced according to the obtained overhead ground wire parameters, overhead ground wire icing conditions and meteorological environment parameters; according to the resistance corresponding to the length of the ground wire section, the overhead ground wire parameter, the icing condition and the meteorological environment parameter, obtaining an ice melting current; calculating a lightning current value according to the overhead ground wire parameters and the lightning current peak value; if the maximum ice-melting current is greater than or equal to the thunder current value, reducing the length of the ground wire section until the maximum ice-melting current is less than the thunder current value; if the maximum ice melting current is smaller than the lightning current value, insulation transformation is carried out on the ground wire; and connecting the transformed ground wire section with a direct-current ice melting device to form an ice melting loop, and carrying out direct-current ice melting without power failure. According to the invention, lightning protection and ice melting are taken into consideration, the ice melting work is completed while lightning protection is maintained, and the reliability and the safety of uninterrupted power supply ice melting of the overhead ground wire in severe weather of a power system are improved.