157 results about "Lightning strokes" patented technology

The invention discloses a power transmission line lightning stroke current waveform inversion method and device, terminal equipment and a storage medium, and belongs to the field of electric pulses. The method comprises the steps of obtaining electrical parameters of a to-be-processed power transmission line and fault waveform data of a plurality of detection points; constructing a lossy transmission line equivalent circuit according to the electrical parameters and determining a telegraph equation; replacing a space differential in the telegraph equation with a central difference, and replacing a time differential in the telegraph equation with a forward difference to determine a lightning wave propagation model; inputting the fault waveform data into a lightning wave propagation model, and traversing each detection point according to a preset time step to obtain intermediate waveform data; the fault waveform data comprises a first voltage parameter and a first current parameter of the head end; the intermediate waveform data comprises a second voltage parameter and a second current parameter of the tail end; and determining the original waveform of the lightning stroke current based on the intermediate waveform data and a preset shunting coefficient. By implementing the invention, the problem that the real lightning waveform during the lightning stroke fault is difficult to accurately obtain in the prior art can be solved.

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 discloses a distribution line lightning stroke grading protection method based on geographical environment factors, and relates to the field of power system overvoltage protection and electromagnetic transient calculation, and the method comprises the following steps: S1, obtaining the real geographical environment parameters of a distribution line system; s2, performing multi-scale conductor distributed parameter modeling on the distribution line system; s3, modeling a nonlinear device of the distribution line system; s4, establishing a thunder and lightning channel model; s5, establishing a lightning arresting shielding model; s6, solving lightning stroke electromagnetic transient time domain response; step S7, lightning stroke risk comprehensive index output; step S8, lightning stroke risk grading protection; according to the invention, the output of the optimal differential protection scheme under the target protection level is realized, and a reliable theoretical basis and an effective technical path are provided for calculation and research of lightning electromagnetic transient effect of the overhead distribution line of the power system, random process evaluation of lightning activity and comprehensive protection design of line lightning.

The invention discloses a Helmholtz coil material lightning magnetic field shielding performance measuring device, which comprises a magnetic field generation device, a shielding test box is arranged in a magnetic field coverage range of the magnetic field generation device, an open hole is formed in the shielding test box, and the open hole enables a magnetic line of force of the magnetic field generation device to transversely penetrate through the shielding test box. The shielding test box is internally provided with the signal measurement unit, the signal measurement unit measures the magnetic field in the shielding test box, the lightning stroke magnetic field environment is accurately simulated, and the repeatability and accuracy of the shielding performance test are improved. The invention further discloses a method for measuring the lightning magnetic field shielding performance of the Helmholtz coil material, the lightning magnetic field shielding performance of the measured shielding material is measured by applying the device for measuring the lightning magnetic field shielding performance of the Helmholtz coil material, and the problem that traditional measurement is poor in accuracy is effectively solved.

The application provides a double-end optical lightning stroke positioning method and system applied to power overhead optical cables, and relates to the technical field of optical fiber sensing; the basic principle of positioning is to realize single-end lightning stroke positioning based on the obvious change of the polarization state of optical signals after the optical signals encounter lightning strokes; the application first uses counter-transmitted pulse polarized light to detect a single-end lightning stroke positioning point, then establishes a double-end positioning equation set to solve an actual lightning stroke positioning point, so that accurate lightning stroke positioning is realized; the application uses the Faraday optical rotation effect of lightning strokes on optical signals to realize lightning stroke positioning based on a polarized light time domain reflectometer; compared with traditional lightning stroke positioning, the application has low operation and maintenance cost, high precision, does not need wide-area accurate time synchronization, has a simple system, is convenient to install, and reduces the blind area of lightning stroke positioning.

The invention relates to the technical field of power grid management, in particular to a power transmission line lightning protection configuration method, which comprises the following steps: acquiring a lightning stroke transient simulation model based on line electrical and structural parameters; secondly, obtaining counterattack and shielding failure lightning-proof data through simulation in combination with the maximum lightning-proof bearing value; then, calculating corresponding counterattack and shielding failure trip-out rates based on the lightning-proof data; and finally, taking the two trip-out rates as core configuration indexes to generate and optimize a lightning protection configuration scheme of the power transmission line. According to the method, the lightning protection configuration is converted from experience driving to data driving through simulation quantitative evaluation, the lightning protection effect and economical efficiency can be scientifically and accurately balanced, and the lightning protection performance and the operation reliability of the line are effectively improved.

The invention discloses a lightning protection device of a radio frequency communication system, the radio frequency communication system comprises a board card and a casing, the board card is provided with a board card ground, and the casing is provided with a casing ground; the protection device comprises a first lightning protection circuit; the first lightning protection circuit comprises a surge discharge circuit and an isolation circuit; the isolation circuit is connected between the board card ground and the machine shell ground. The isolation module is used for isolating a board card ground from a shell ground; the surge discharge circuit is connected between the board card ground and the machine shell ground and used for guiding the lightning stroke surge signals into the machine shell ground through the board card ground. According to the invention, the surge discharge circuit is additionally arranged on the basis of high-voltage isolation of the board card ground and the case ground, so that the problems that isolation between the board card ground and the isolation ground cannot be realized at the same time and a complete signal ground plane is used as a backflow path when a lightning stroke surge protection measure is taken by the radio frequency antenna at present are solved.

The utility model belongs to the field of water tanks, particularly relates to a lightning-protection assembly type bolted connection water tank, and aims to solve the problems that the top of an existing traditional water tank is usually provided with a maintenance port which is convenient for personnel to enter the water tank and maintain internal electric appliances, but the personnel usually carry a tool box by hands during maintenance, and the maintenance is inconvenient. In order to solve the problems that when a person climbs to the top of a water tank through a crawling ladder, the person needs to lift a tool box all the time, the tool box is inconvenient to climb, potential safety hazards are likely to occur, and the water tank cannot be subjected to lightning protection and is likely to be damaged in the thunderstorm weather using process, the following scheme is provided that the tool box comprises a foundation platform, and channel steel is fixedly arranged at the top of the foundation platform; a worker can fix the tool box to the tail end of the connecting rope through the transportation mechanism, the tool box does not need to be held by hand in the climbing process, the instability risk caused by holding with one hand is avoided, lightning current can be directly guided into the ground through the lightning protection mechanism, and the water tank and internal equipment are prevented from being damaged by lightning stroke.

The application relates to the technical field of building lightning protection, in particular to a lightning protection device for fabricated buildings, which comprises a fabricated building, a support assembly is installed at the top of the fabricated building, a lightning attracting device is installed at the top of the support assembly, a lightning guiding assembly is installed on one side of the lightning attracting device, and the lightning guiding assembly is installed on the outer side of the fabricated building. In the application, the support assembly, the lightning attracting device, the insulating block, the lightning protection grounding needle, the mounting assembly, the mounting plate, the threaded head, the reinforcing assembly, the lightning guiding assembly, the connector, the lightning protection grounding belt and the fixer are arranged, when the lightning protection grounding needle is in the lightning stroke, the lightning protection grounding needle can transfer the lightning to the ground through the connector, the wire, the lightning protection grounding belt and the grounding device. Due to the design of the insulating block and the fixer, no hole needs to be punched when the lightning protection device is installed, therefore, the connection part of the lightning protection device and the fabricated building is not conductive, the lightning cannot affect the fabricated building, and the safety of the fabricated building is improved.

The invention provides a plateau mountain PLP installation height determination method and system. The plateau mountain PLP installation height determination method comprises the steps of obtaining a plurality of preset installation positions of a plurality of PLP lightning protection devices; constructing a plurality of installation areas corresponding to the plurality of PLP lightning protection devices according to the plurality of installation positions; acquiring historical lightning stroke data corresponding to the current installation area; determining a first protection device with the farthest horizontal distance from the first PLP lightning protection devices corresponding to the area in the current installation area; obtaining topographic data and target equipment height of the first protection equipment, and a target horizontal distance between the first protection equipment and the first PLP lightning protection device; and according to the historical lightning stroke data, the topographic data, the target equipment height and the target horizontal distance, the installation height of the first PLP lightning protection device is calculated based on a rolling ball method. The precision of the PLP installation height can be improved, and the method is suitable for the special terrain and the lightning stroke risk of the plateau mountain land.

The utility model discloses a lightning surge counting and monitoring device with a remote data uploading function. The lightning surge counting and monitoring device comprises a main control circuit board, a display control circuit board and a display module which are packaged in an outer shell, the display control circuit board is electrically connected to the main control circuit board; the display module is electrically connected to the display control circuit board and is exposed from the upper surface of the outer shell; the first end of the main control circuit board is provided with a power supply wiring terminal and a sensor wiring terminal, and the second end of the main control circuit board is provided with a communication wiring terminal. The device can record the number of lightning strokes and display the number of lightning strokes through the display module, and can also upload the number of lightning strokes, time and other data to a maintenance platform in a remote communication mode, so that maintenance personnel can know the state of the system in time. Maintenance personnel can assess and maintain the damage degree of the lightning surge protection device conveniently, the safety of an electric power system can be improved, and the risk assessment capability of the electric power system is enhanced.

The application relates to a lightning stroke risk assessment method and device based on machine learning and a storage medium, wherein the method comprises the following steps: acquiring lightning data, wind field related data and lightning disaster data, and performing data preprocessing to construct a data set; the data set is labeled based on a semi-supervised K-means algorithm, wherein the data set is labeled as lightning disaster data, non-lightning disaster data and unlabeled data; a LapSVM model and a PSO algorithm are constructed, and parameters are initialized; data is input into the model for training, a lightning stroke risk probability is generated according to data labels and model parameters, and the PSO algorithm is used to optimize model parameters; lightning data and wind field related data to be evaluated are used as input, a trained LapSVM model is used for lightning stroke risk assessment, and a lightning stroke risk probability is output. Compared with the prior art, the application has the advantages of being completely data-driven and being capable of utilizing the data structure information of unlabeled samples.

The utility model relates to the technical field of frequency converter insulation and heat dissipation, and discloses a high-power frequency converter insulation and heat dissipation structure which comprises a bottom plate, foot columns and side columns, the foot columns are fixedly connected to the four corners of the upper surface of the bottom plate, and the side columns are fixedly connected to the middle portions of the two sides of the upper surface of the bottom plate. According to the high-power frequency converter insulation heat dissipation structure, the bottom plate, the foot columns and the side columns are combined to form a frame structure used for bearing the heat dissipation assembly and the frequency converter, meanwhile, the rigidity of the whole structure is enhanced, and the frame structure is made of a steel material, can be directly used for grounding and has heat dissipation, impact resistance and lightning stroke resistance performance; the outer side vacant part of the frame body is filled with the side plates, the top of the frame body is sealed and covered with the top plate, the side plates and the top plate are made of metal materials such as copper with high heat conduction performance and high conductivity, the heat dissipation and signal shielding capacity can be achieved, meanwhile, the interior of each side plate is a hollow outer layer, heat dissipation fins and arc-shaped pieces are installed, the heat dissipation area can be increased, and the heat dissipation efficiency is improved. And the heat dissipation effect is improved.

The invention provides a lightning protection detection point location management method and system, and the method comprises the steps: dividing a to-be-detected region into grids, and generating a region lightning protection risk index of each grid according to a space-time diagram convolution network; obtaining own state data and external environment data, inputting the data into a pre-trained MLP neural network model based on an attention mechanism, and outputting a health degree score of the lightning protection detection point location, the external environment data including a regional lightning protection risk index; judging whether the health degree score is greater than a threshold value; if yes, according to the health degree score data, the number of lightning strokes and the average temperature and humidity, determining continuous predicted health degree scores by adopting an LSTM model and an XGBoost model; judging whether the predicted health degree score is greater than a threshold value; if yes, the corresponding lightning protection detection point positions are removed; and if it is judged that the health degree score of the lightning protection detection point is not greater than the threshold value, the corresponding lightning protection detection point is reserved, and dynamic management based on real-time risks is effectively realized.

The utility model belongs to the technical field of lightning protection current transformers, and particularly relates to an energy storage current transformer with a lightning protection module, which comprises a current transformer shell, a connecting seat connected to the outer side of the current transformer shell, a lightning protection assembly connected to the current transformer shell, and a lightning protection device connected to the inner side of the current transformer shell, the surge protector and the lightning protection device are arranged on the inner side of the converter shell, the surge protector and the lightning protection device are connected with an external grounding system through a grounding wire, the movable ventilation part assists in air exhaust and heat dissipation of the interior of the converter shell, the lightning protection device is matched with the grounding wire, and when lightning stroke occurs, lightning impulse energy is absorbed and discharged by the grounding wire through the external grounding system. And meanwhile, the surge protector works, so that the possibility that other devices in the box body are damaged when the lightning protection device generates an arc spraying phenomenon is reduced.

The invention discloses a power grid grounding simulation method and system based on multi-parameter coupling modeling. The method comprises the following steps: acquiring soil resistivity, lightning stroke current waveform data and morphological structure information of a grounding electrode at different depths and geographic positions; constructing a recursive coupling current equation based on time history feedback, and recursively calculating a local grounding current distribution function at the current moment and at the spatial position by adopting a multi-channel dynamic weighting mechanism based on the recursive coupling current equation; fractal dimensions are dynamically calculated according to the soil resistivity and the morphological structure information of the grounding electrode, and a fractal current distribution function is established based on the fractal dimensions and a local grounding current distribution function; the local current value and the fractal current distribution function are fused, the total grounding current is dynamically calculated in a time integration mode, and step voltage is calculated in combination with a current response function, the soil resistivity and the lightning stroke waveform; and determining the state of the grid grounding system based on the total grounding current and the step voltage.

The utility model relates to the field of formed end monitoring, in particular to a formed end lightning stroke monitoring device and a formed end monitoring device. The formed end lightning stroke monitoring device provided by the utility model comprises a first processing module and a monitoring module, and the monitoring module comprises a first sensor unit matched with a cable formed end and a second sensor unit matched with a collecting bar; the first sensor unit is used for outputting a position signal to the first processing module when current larger than a first threshold value flows through the cable forming end, and the second sensor unit is used for outputting a current value signal to the first processing module when current larger than a second threshold value flows through the collecting drain.

The utility model belongs to the technical field of lightning protection, and particularly relates to a cage-shaped lightning arrester in a high mountain area, which comprises an upper lightning guide ring, a lower lightning guide ring and a plurality of unit lightning rods, the plurality of unit lightning rods are annularly distributed around a set area of a high mountain area, the set area is used for installing electronic equipment, and the height of the upper end of the electronic equipment is smaller than that of the spire of any unit lightning rod; the upper lightning guide ring is electrically connected with the upper portions of all the lightning rods, and the lower lightning guide ring is located below the upper lightning guide ring and electrically connected with the lower portions of all the lightning rods. According to the scheme, the plurality of unit lightning rods are arranged in multiple directions, so that the lightning protection effects of the electronic equipment in different directions are effectively improved, and the electronic equipment is suitable for high mountain areas where lightning strokes frequently occur; in addition, the lightning conductor rings are used for electrically connecting all the unit lightning rods, so that electrical conduction between adjacent lightning rods is realized, and the lightning protection performance is further improved. Therefore, the direct damage of thunder and lightning to the protected electronic equipment can be effectively reduced.

The invention relates to the technical field of power transmission line monitoring, in particular to a lightning stroke detection method and device for a self-adaptive polarization controller. According to the invention, the polarization state of the input optical signal is compensated in real time through the self-adaptive polarization controller existing at the receiving and transmitting end of the optical cable line, and the phase shift amount change signal of each phase shifter in the self-adaptive polarization controller is subjected to high-pass filtering processing, so that the occurrence of the lightning stroke event is judged. A timestamp related to occurrence of a lightning stroke event is obtained, and the occurrence position of the lightning stroke event is obtained according to the timestamp. According to the invention, an original framework of an original communication system is not changed, a device does not need to be reset for lightning stroke point positioning, and accurate positioning of a lightning stroke event can be realized while polarization compensation is realized, so that re-laying of a lightning stroke positioning device is avoided, multiplexing of equipment is realized, and application cost is greatly reduced.

The invention discloses a power transmission line lightning stroke short circuit fault rapid diagnosis method, system and device and a medium, and the method comprises the steps: obtaining single-end fault recording data of a power transmission line, carrying out the denoising processing of the recording data, and carrying out the detection of a fault starting moment, and obtaining an effective fault transient signal with the fault starting moment as a reference; extracting a plurality of basic electrical features, and constructing composite features based on the basic electrical features to form an initial feature set; performing chi-square test and recursive feature elimination on the initial feature set in sequence, and performing two-stage feature selection to obtain an optimized feature subset; and taking the optimal feature subset as input, sending the optimal feature subset into a pre-trained multi-stage cascade classifier, and outputting a comprehensive diagnosis result containing a fault phase, a fault property, an impedance grade and a fault reason by the classifier. According to the method, high-precision, high-robustness, rapid and explainable integrated fault comprehensive judgment is realized.

The invention relates to the technical field of electric energy meter composite detection, in particular to an electric energy meter composite environmental influence test device, method and system. The test device comprises a high and low temperature damp heat test box, a multifunctional integrated detection device, a fast transient pulse train generator and a lightning stroke surge generator, the output end of the test device is connected to a power port and a signal port of a to-be-tested electric energy meter, and the four parts are controlled to work cooperatively. The stress applying device is used for synchronously or alternately applying high-temperature and high-humidity environment stress, electromagnetic interference stress, actual load stress and reclosing operation stress to the to-be-tested electric energy meter. The multi-stress coupling real working condition reproduction is realized on the hardware level, the authenticity and severity of the test are greatly improved, potential defects which are difficult to expose in a single test can be excited, and the method has the advantages of high authenticity, comprehensive detection and high practicability.

The invention relates to the technical field of high-voltage and insulating metal lightning stroke damage and X-ray imaging, and particularly discloses an X-ray-based lightning current metal damage real-time observation system which comprises a combined wave generator, an observation cavity, an X-ray imaging system, a lead protection system, an oscilloscope and a computer. The method has the beneficial effects that the complete dynamic process, including transient phenomena such as microcrack initiation, propagation, molten pool formation and solidification, of internal damage of the metal sample under the action of lightning current can be captured at microsecond-level time resolution, and the limitation that a traditional optical microscope or electron microscope can only provide a static result is overcome; the method can effectively treat the situation that key details such as the root of an electric arc and a tiny molten pool on the surface of an electrode are submerged by white light and cannot be clearly distinguished, so that accurate judgment on the damage process is enhanced, and analysis on lightning stroke metal damage in the high-voltage and insulation research direction is facilitated.

The utility model relates to the technical field of lightning protection, in particular to a lightning protection structure of a medium-wave broadcast transmitter, which comprises a protection cabinet, the protection cabinet comprises a fixed cabinet, the bottom of the fixed cabinet is provided with a wire I, the bottom end of the wire I is fixedly connected with a grounding grid, and an L-shaped bracket is fixedly arranged on a base of an external antenna. A lightning rod is fixed to the top of the L-shaped support, a second wire fixed to the grounding grid is fixed to the bottom of the L-shaped support, the top end of the second wire is fixedly connected with the lightning rod, and the outer side of an external cable is sleeved with a conducting ring. According to the utility model, the conducting ring is sleeved on the cable of the antenna and the transmitter cabinet, so that the lightning stroke current on the cable can be grounded through the lead 3 when the current of lightning counterattack, lightning shielding failure or induction lightning stroke is transmitted to the transmitter cabinet through the cable along the antenna; the cable is effectively prevented from directly transmitting strong lightning stroke current to the transmitter cabinet, and electrical elements in the transmitter cabinet can be protected.

The embodiment of the invention provides a distribution network lightning stroke fault detection method and system. The method comprises the following steps: obtaining lightning activity data and distribution network fault alarm data; the lightning activity data and the distribution network fault alarm data are subjected to space-time correlation analysis, multi-dimensional features of correlation events are extracted, lightning stroke research and judgment data are generated based on a preset research and judgment model, the lightning stroke research and judgment data comprise lightning stroke fault judgment results and tower risk levels, and the multi-dimensional features at least comprise ground lightning density and terrain factors; based on the tower risk level and a preset lightning protection strategy library, generating a lightning protection treatment strategy for at least one tower in the associated event; and processing information including the lightning stroke fault judgment result, the associated tower information and the lightning protection treatment strategy is sent to an active first-aid repair work order system or a lightning protection measure treatment work order system. Through multi-dimensional feature fusion and modeling study and judgment, the accuracy and reliability of screening real lightning stroke faults are improved, and misjudgment and delay caused by dependence on artificial experience are reduced.

The utility model provides a lightning-proof overhead insulated cable, which belongs to the technical field of cables and comprises a metal braid layer and a lightning-proof assembly arranged on the outer wall of the metal braid layer, and the lightning-proof assembly comprises a protective layer, a battery cell, a buckle, a conducting ring, a reinforcing rib, a traction rope, a mounting table, a limiting block, a guide rod, a rotating rod and a lightning rod main body. Through the linkage design of the traction rope, the limiting block and the guide rod, the working angle of the lightning rod main body is adjusted, compared with a traditional fixed lightning arrester, the point discharge loss in non-thunderstorm weather can be reduced by 80%, meanwhile, the lightning stroke response speed is increased by 35%, and a multi-layer conductive framework, a metal braid layer, a buckle, a conduction ring and a reinforcing rib are adopted, so that the lightning protection effect is improved. Actual measurement shows that the shielding structure can bear the transient current impact of 200kA / mu s, the conductivity is improved by four times compared with a conventional single-layer shielding structure, and it is ensured that the insulating layer 2 is still kept intact under the electric field intensity of 100kV / m.

The invention provides an automatic operation and maintenance type lightning stroke image capture remote control communication cabinet, and relates to the technical field of adjustment control systems, the automatic operation and maintenance type lightning stroke image capture remote control communication cabinet comprises a fixed assembly, a movable assembly and a cleaning calibration mechanism, a fixed plate is integrally formed on the side edge of the fixed assembly, and a bolt is inserted into the tail end of the fixed plate; the fixing plate is installed on the inner side of the communication cabinet through bolts, one side of the fixing assembly is sleeved with a movable assembly, a motor is in threaded connection with the middle of the fixing assembly, a driving shaft is inserted into the output end of the motor, and the tail end of the driving shaft is fixedly connected with the movable assembly. According to the invention, the definition of the image captured by the image capturing mechanism at the inner side can be prevented from being influenced, and meanwhile, the cleaning and calibrating mechanism can be automatically triggered to extend outwards by virtue of the centrifugal effect generated by high-speed rotation, so that the surface of the light-transmitting ring is scraped and cleaned; and whether the response time of the current image capturing mechanism is normal or not can be judged, and the purpose of automatic and rapid calibration detection is achieved.

This disclosure provides a method, apparatus, device, and storage medium for predicting the probability of lightning strikes on transmission lines. The method includes acquiring real-time distribution data of a target transmission line, inputting a preset environmental correction model, performing localized parameter calculations to obtain the physical field calculation parameter set and regional lightning discharge conditions for the target area corresponding to the target transmission line, inputting a charge movement model to determine the predicted electric field distortion data and the predicted charge concentration distribution data along the line, aligning the two with pre-acquired lightning measurement data spatiotemporally and performing error analysis to obtain error spatiotemporal distribution data, and adjusting the environmental correction model and the charge movement model accordingly. The final generated lightning strike probability report enables the prediction of spatial charge movement and electric field distortion under lightning strikes on high-altitude transmission lines and can specifically assess flashover risks, providing a quantitative analysis tool for differentiated lightning protection design of high-altitude ungrounded transmission lines.

The utility model discloses an electric leakage detection system, an electric leakage sensor and a control panel, and belongs to the technical field of electric leakage detection. The system comprises a detection device, an electric leakage filter circuit and a signal processing circuit, the detection device is connected with a power line, and the detection device is configured to detect and output a power signal of the power line; the electric leakage filter circuit is provided with a first input end and a first output end, and the first input end is connected with the detection device; the signal processing circuit is provided with a second input end and a second output end, the second input end is connected with the first output end, the second output end is configured to output a state signal, and the state signal is used for representing an electric leakage detection result. According to the application, the influence of surge signals caused by lightning stroke on power supply signals can be improved through filtering of the electric leakage filter circuit, so that subsequent circuits can be protected from being impacted by the surge signals caused by the lightning stroke, the safety of electric leakage detection is ensured, and reliable state signals representing electric leakage detection results are obtained through the signal processing circuit.

The invention belongs to the technical field of thunder and lightning monitoring, and provides a portable thunder and lightning monitoring instrument optimization method meeting multi-scene requirements and a thunder and lightning monitoring instrument, and the protection performance of a protection circuit is improved along with the increase of thunder and lightning alarm thresholds in different scenes. The alarm threshold value is adjusted according to a monitoring scene, the alarm strategy is determined according to comparison of the alarm threshold value and a monitoring evaluation value, and the monitoring evaluation value is determined according to the current magnitude, the number of lightning strokes and the lightning stroke danger degree in the monitoring scene; a power supply mode change-over switch is arranged, and a storage battery power supply mode, a power grid power supply mode and a new energy power supply mode are switched according to the number of lightning strokes and the magnitude of current; according to different monitoring scenes, protection circuits of different forms are added to the current transformer, different alarm strategies are embedded in the alarm module, and different power supply modes are designed for the power supply module, so that the portable lightning monitor can well meet the use requirements under multiple scenes.

This application discloses a method, device, and online monitoring system for lightning strike type identification, relating to the field of power grid lightning protection safety technology. The solution provided in this application directly acquires the impulse discharge current on a 10kV surge arrester and performs waveform time-domain feature analysis. This analysis is then matched with a preset waveform time-domain feature threshold range to determine the lightning strike type. This avoids the complex reflection and cumbersome preprocessing procedures of traditional traveling wave data processing, simplifying the lightning strike type identification process, improving identification efficiency, and facilitating timely and targeted lightning protection measures to ensure the safe and stable operation of the power grid system.