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147 results about "Lightning strike" patented technology

A lightning strike or lightning bolt is an electric discharge between the atmosphere and an object. They mostly originate in a cumulonimbus cloud and terminate on the ground, called cloud to ground (CG) lightning. A less common type of strike, called ground to cloud (GC), is upward propagating lightning initiated from a tall grounded object and reaches into the clouds. About 25% of all lightning events worldwide are strikes between the atmosphere and earth-bound objects. The bulk of lightning events are intra-cloud (IC) or cloud to cloud (CC), where discharges only occur high in the atmosphere. Lightning strikes the average commercial aircraft at least once a year, but modern engineering and design means this is rarely a problem. The movement of aircraft through clouds can even cause lightning strikes.

Precise early warning system for single-tree lightning fire by using lightning trajectory detected through data fusion

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.
Owner:INST OF FOREST ECOLOGY ENVIRONMENT & PROTECTION CHINESE ACAD OF FORESTRY +1

Radio frequency front-end lightning protection circuit and lightning protection equipment

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.
Owner:SHANGHAI HAIJI INFORMATION TECH

Wind turbine and lightning current measuring device

ActiveCN224496644UNacelleLightning strike
This application discloses a wind turbine and a lightning strike current measuring device. The wind turbine includes a lightning arrester, a lightning conductor, a magnetic field sensor, and a controller. The lightning arrester is installed on the blade of the wind turbine to receive lightning strike current. The lightning conductor is located inside the blade and arranged along the length of the blade. One end of the lightning conductor is electrically connected to the lightning arrester, and the other end is electrically connected to the nacelle of the wind turbine. The magnetic field sensor is installed on the yaw platform of the wind turbine to detect the electromagnetic induction value generated when the lightning strike current flows through the yaw platform. The controller is electrically connected to the magnetic field sensor and receives the electromagnetic induction value and calculates the lightning strike current value based on the electromagnetic induction value. The technical solution provided by this application, through the magnetic field sensor preset on the yaw platform, detects the electromagnetic induction value generated when the current flows through in real time and transmits the electromagnetic induction value to the controller electrically connected to it. The controller can accurately calculate the lightning strike current value.
Owner:YUANJIAN WIND POWER JIANGYINENVISION ENERGY CO LTD +1

Forming aircraft component with lightning strike protection

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

Connection structure for earthquake observation cave weak signal transmission line

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

100GNRZ direct dimming anti-lightning SOP scrambling voltage model construction method based on deep learning

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

Lightning strike risk calculation device and lightning strike risk display system

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

Distribution line lightning stroke risk assessment method, device, equipment and medium

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

Lightning rod (lightning arrester)

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

An insulator service performance evaluation method considering multiple lightning strikes and air flow factors

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

A lightning strike sensor

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

A method and system for predicting reliability of a heavy haul railway overhead line system under thunderstorm weather

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

Transient grounding current measurement and diagnosis device and method based on cooperation of hollow current transformers

The invention provides a transient grounding current measurement and diagnosis device and method based on hollow mutual inductor cooperation. The transient grounding current measurement and diagnosis device comprises a mutual inductor module, a data acquisition and conversion module, a signal conditioning and protection module, a master control and storage module, a collaborative algorithm module, an intelligent trigger module, a power supply module, a communication and positioning module and a protective shell. According to the transient grounding current measurement and diagnosis device and method based on cooperation of the hollow mutual inductor provided by the invention, the full waveform of the transient grounding current can be accurately measured, the total underground lightning current can be accurately inverted, and the shunting condition of each grounding path of power equipment can be analyzed in real time; the health state of the grounding system is intelligently diagnosed, a specific fault grounding path is accurately positioned, and the capture rate and reliability of lightning stroke events are improved.
Owner:STATE GRID TIANJIN ELECTRIC POWER COMPANY +1

Rock plate curtain wall roof concealed type lightning protection and lightning receiving system and construction method of rock plate curtain wall roof concealed type lightning protection and lightning receiving system

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

Methods, systems, and media for assessing lightning strike risk of transmission lines based on multi-source data

This invention relates to the field of power equipment risk assessment technology, and discloses a method, system, and medium for assessing the lightning strike risk of transmission lines based on multi-source data. The method includes: acquiring three-dimensional laser point cloud data, lightning statistics data, and meteorological data of the transmission line; the three-dimensional laser point cloud data includes terrain parameters of the tower locations; calculating the conductor spatial position of the electrical geometric model of the transmission line under the influence of dynamic wind deflection based on the meteorological data, as well as the dynamic wind deflection correction coefficient of the electrical geometric model; and accurately calculating the tripping rate of the transmission line, especially the backflashover tripping rate, based on the terrain correction coefficient corresponding to the terrain parameters, the conductor spatial position, the dynamic wind deflection correction coefficient, and the lightning statistics data, thereby accurately assessing the lightning strike risk of the line.
Owner:YUNNAN POWER GRID CO LTD +1

A surge arrester condition monitoring system

This invention relates to a surge arrester condition monitoring system, comprising a data acquisition module, a lightning strike assessment module, a prediction module, and a threshold adjustment module. The data acquisition module collects current and voltage waveforms from multiple lightning strikes within a single lightning event, as well as the time intervals between adjacent strikes. The lightning strike assessment module calculates the intensity ratio of single lightning strikes based on the surge arrester's baseline withstand parameters, quantifies the cumulative effect of consecutive lightning strikes using a time interval-based correction coefficient, and obtains a weighted fusion index of the comprehensive impact of lightning events on the surge arrester. The prediction module uses this index, combined with the natural aging rate, to update the surge arrester's estimated remaining lifespan. The threshold adjustment module adjusts the abnormal monitoring thresholds for operating parameters such as leakage current, resistive current, and temperature based on the updated remaining lifespan. This invention achieves quantitative assessment of the surge arrester's aging state, dynamic prediction of remaining lifespan, and intelligent adjustment of monitoring thresholds, effectively improving the foresight and accuracy of condition monitoring.
Owner:NANYANG ZHONGWEI ELECTRIC CO LTD

Device and method for reducing concentration of combustible gas in twice sealed space of floating roof tank

PendingCN121990280AIncrease the negative pressure valuereduce concentrationLarge containersLightning strikeControl system
The invention discloses a device for reducing the concentration of combustible gas in a twice sealed space of a floating roof tank, which comprises an external floating roof oil storage tank, a secondary seal in the external floating roof oil storage tank is respectively communicated with a gas inlet conduit and a gas suction pipeline, and the other port of the gas inlet conduit is provided with a one-way valve; the pretreatment device is connected with a gas detection instrument through the gas extraction pipeline, the gas detection instrument is electrically connected with a control system and is connected with a gas recovery treatment device through the gas extraction pipeline, and the gas extraction pump is connected with the gas recovery treatment device through the gas extraction pipeline; and the sucking pump is electrically connected with the control system. The invention also discloses a method for reducing the concentration of combustible gas. According to the device and the method for reducing the concentration of the combustible gas in the two-time sealed space of the floating roof tank, the gas in the sealed space of the external floating roof tank is controlled within a safe range by detecting the concentration of the gas in the external floating roof tank and discharging the gas, so that a sealing ring fire caused by lightning stroke and static electricity is avoided.
Owner:CHANGQING ENGINEERING DESIGN CO LTD +1

Wind turbine blade with lightning protection receptor

Proposed is a wind turbine blade with a lightning protection receptor. The wind turbine blade with a lightning protection receptor is a technology that allows for excellent lightning capture rate for both negative and positive lightning by improving lightning measures for conventional wind turbines, which are vulnerable to positive lightning, in line with the increasing wind turbine heights for large-scale power generation and the trend toward offshore wind power, and that minimizes post-repair / supplementary measures by limiting blade damage / coating peeling due to lightning strikes to a narrow area, unlike in the conventional case where damage or peeling of the coating occurs over the entire area of a blade when struck by lightning on an edge wire inserted into the lateral inner side of the blade.
Owner:KOREA ELECTROTECH RES INST

Lightning information provision system, lightning prediction device, and lightning prediction method

To provide a lightning information system capable of predicting lightning strikes with high accuracy and speed. [Solution] According to the embodiment, the lightning information provision system comprises a lightning prediction device and an information distribution device. The lightning prediction device comprises a data collection unit and a lightning prediction processing unit. The data collection unit collects weather-related data from data sources including a multi-parameter phased array weather radar. The lightning prediction processing unit calculates lightning prediction data based on the weather-related data. The information distribution device comprises a determination unit and an information distribution unit. The determination unit determines whether or not to issue a warning based on the lightning prediction data. The information distribution unit issues a warning based on the determination result of the determination unit.
Owner:KK TOSHIBA

A system for measuring the electrical parameters of a lightning activity path based on spatiotemporal clustering analysis

This invention discloses a system for measuring electrical parameters along a lightning path based on spatiotemporal clustering analysis, belonging to the field of lightning path electrical parameter measurement technology. It includes a data acquisition module for collecting lightning data, including the time, longitude, and latitude of the lightning event; an electrical parameter measurement module for measuring electrical parameters along the lightning path, including electric field strength, current intensity, and voltage; and sensors for real-time monitoring of areas along the lightning path to obtain accurate electrical parameter data. The system uses sensors to measure electric field strength, current transformers to measure current intensity, and voltage sensors to measure voltage. This invention significantly improves the accuracy of electrical parameter measurement, addressing the problem of poor accuracy. When measuring the instantaneous large current of a lightning strike, the current transformer, with its suitable range and fast response, can accurately record changes in current intensity, providing reliable data for studying lightning current characteristics.
Owner:呼和浩特市气象灾害防御中心(呼和浩特市决策气象服务中心呼和浩特市雷电防御中心)

Transformer with lightning protection structure

PendingCN122370152ALightning strikeTransformer
This invention discloses a transformer with a lightning protection structure, comprising: an oil tank, windings, an iron core, an integrated lightning protection cover, a grounding structure, a lightning protection conductive plate, and a layered insulation structure. The transformer features a lightning protection cover and lightning-proof protrusion electrically connected to the outer casing at the top of the oil tank, a grounding structure including a grounding base and grounding electrodes at the bottom, and a lightning protection conductive plate connecting the lightning protection cover and the grounding base internally. The plate has conductive contacts that fit against the insulating outer casing of the windings. Multiple layers of insulating sleeves and insulating spacers are provided on the outer side of the windings. This application achieves dual protection against direct and induced lightning strikes through structural optimization, shortens the lightning current conduction path for rapid voltage relief, enhances internal insulation performance, effectively prevents insulation breakdown caused by lightning overvoltage, and improves operational stability.
Owner:GUANGDONG SHENGTE ELECTRIC CO LTD

A distributed photovoltaic point inspection priority dynamic sorting method based on meteorological factors

This invention discloses a dynamic prioritization method for distributed photovoltaic (PV) site inspections based on meteorological factors. The method includes: numbering each PV site and extracting basic information for each site; calculating the lightning strike density at each site and at different distances from the site, and constructing lightning strike density evaluation indicators for each site; statistically analyzing the frequency of each meteorological factor within its corresponding range, and constructing meteorological disaster evaluation indicators for wind speed, temperature, and precipitation at each site; calculating the weights of the evaluation indicators, establishing a meteorological disaster risk assessment calculation model, and providing a dynamic prioritization of distributed PV site inspections. This invention can dynamically assess the meteorological disaster risk at each distributed PV site, providing a priority ranking decision for daily inspections. It overcomes the current situation where existing power plants conduct daily inspections of each site individually, lacking specificity and timeliness in identifying potential hazards at different sites. Simultaneously, it provides a basis for differentiated prevention measures against meteorological disasters at different sites.
Owner:CHINA POWER CONSTRUCTION NEW ENERGY GROUP CO LTD EAST CHINA BRANCH

A method and apparatus for predicting lightning damage to a wind turbine

The application discloses a method and device for predicting lightning damage of a wind turbine generator, and the method comprises the following steps: acquiring lightning meteorological data corresponding to each wind turbine generator from a meteorological information system, wherein the lightning meteorological data are used for judging whether lightning strikes occur in the wind turbine generator; acquiring alarm data corresponding to each wind turbine generator from a monitoring system, wherein the alarm data are used for reflecting that the wind turbine generator is affected by lightning and generates an alarm; and predicting a wind turbine generator suffering from lightning damage from each wind turbine generator based on the lightning meteorological data and the alarm data. It can be seen that the lightning meteorological data corresponding to each wind turbine generator are acquired from the existing meteorological information system, the alarm data corresponding to each wind turbine generator are acquired from the original monitoring system, and the two are combined and verified with each other to judge whether lightning strikes occur in each wind turbine generator. The method does not need to additionally configure other devices on the wind turbine generator, can accurately and effectively judge whether lightning strikes occur in the wind turbine generator, is easy to implement, low in cost and simple to maintain.
Owner:BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD

Clamping type voltage sensor and lightning protection control method thereof

The invention discloses a clamping type voltage sensor and a lightning protection control method thereof, and relates to the technical field of power system monitoring, the clamping type voltage sensor comprises a first shell, a second shell is hinged to the first shell, the first shell and the second shell are both provided with semicircular grooves used for clamping transmission wires, and when the first shell and the second shell are closed, the first shell and the second shell are closed. The first shell and the second shell are provided with two semicircular grooves, the two semicircular grooves form a circular groove, the first shell and the second shell are assembled and connected with a buckle structure used for enabling the first shell and the second shell to be mutually buckled, a voltage measuring assembly and a power taking assembly are installed in the first shell and the second shell, and the power taking assembly supplies power to the voltage measuring assembly; according to the invention, lightning stroke of thunderstorm weather to the sensor can be effectively prevented, the clamping type voltage sensor cannot slide on the transmission wire through clamping, and the stability of a measurement system is improved.
Owner:ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD

Power converter and power supply system

PendingCN122660393AOvervoltageLightning strike
The application provides a power converter and a power supply system, and belongs to the technical field of power electronics. The power converter provided by the application can accurately determine that the power converter is struck by lightning and send a lightning strike alarm signal when detecting overcurrent of a direct current end or an alternating current end of a power conversion circuit and voltage mutation of the alternating current end occurs under the condition that a lightning arrester is not failed. Alternatively, the power converter can accurately determine that the power converter is struck by lightning and send a lightning strike alarm signal when detecting overvoltage of the direct current end of the power conversion circuit and voltage mutation of the alternating current end occurs under the condition that the lightning arrester is not failed. Therefore, operation and maintenance personnel can accurately estimate the remaining life of the lightning arrester based on the lightning strike alarm signal, so as to replace the lightning arrester in time before the lightning arrester is failed, thereby ensuring that the power converter is safely and stably operated.
Owner:HUAWEI TECH CO LTD

Methods for determining likelihoods of ignition hazards

PendingUS20260184436A1ThermodynamicsPressure generation
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.
Owner:THE BOEING CO

Carbon fiber composite laminated plate lightning impact force axial load full waveform measuring device and method

The application discloses a lightning strike impact force axial load full waveform measuring device and method for carbon fiber composite laminated plates, and the axial load full waveform measuring device comprises a controllable intensity lightning current source, a test carbon fiber composite laminated plate and a lightning impact force test control and measurement analysis unit. The impact force acting on the upper side of the test carbon fiber composite laminated plate is transmitted to a piezoelectric sensor through a stress wave transmission mechanism transmission unit, so that the piezoelectric sensor obtains a signal generated by a real stress wave generated by lightning strike without reflection. By adjusting the amplitude of the lightning current output by the controllable intensity lightning current source, the mathematical analysis formula and the time response characteristic between the axial lightning impact force generated when the lightning current acts on the test material and the lightning current electrical parameter are obtained. The relationship between the lightning damage morphology and damage degree of the carbon fiber composite material and the axial lightning impact force is obtained, and theoretical support is provided for the research on the lightning damage mechanism of the test carbon fiber composite laminated plate.
Owner:XI AN JIAOTONG UNIV

Protection device and protection method for preventing lightning stroke damage

The invention belongs to the technical field of equipment power utilization protection, and discloses a protection device and a protection method for preventing lightning stroke damage, and the protection device comprises an overvoltage protector which is connected with a power supply line, then is grounded, and is used for limiting transient overvoltage and discharging surge current; and the fuse is connected in series in a loop where the electric equipment is located and cuts off the loop where the electric equipment is located when the residual current exceeds the steady-state working current of the electric equipment, and the electric equipment takes the electric energy from the power supply line. According to the invention, electrical equipment can be effectively protected from being damaged by lightning surge current and residual current, long-term stable operation of the equipment is ensured, specifically, the current can be cut off in time through a quick response mechanism of the fuse, overload or short circuit of the equipment is avoided, and the safety and reliability of the equipment are improved.
Owner:QINGHAI ZHONGKONG SOLAR POWER CO LTD

Lightning on-line monitoring system and method for wind driven generator

The invention provides a thunder and lightning online monitoring system and method for a wind driven generator. The online monitoring system comprises a data server, a communication transmission module and a plurality of thunder and lightning monitoring units. The thunder and lightning monitoring unit is in signal connection with the data server through the communication transmission module; the thunder and lightning monitoring unit comprises a blade monitoring module, a cabin hub monitoring module and a surge protector monitoring module; the blade monitoring module, the cabin hub monitoring module and the surge protector monitoring module are respectively provided with a lightning protection device and a sensor. The lightning protection device and the sensor are installed in the blade, the surge protector and the cabin hub and used for collecting lightning current characteristic parameters when the blade, the surge protector and the cabin hub of the wind driven generator are struck by lightning and transmitting the lightning current characteristic parameters to the lightning collection unit. Secondary damage of the wind driven generator can be avoided, and the downtime is shortened; major accidents caused by faults of the surge protection device can be avoided, and the troubleshooting cost is reduced; and lightning stroke of the blade can be monitored.
Owner:POWERCHINA HUADONG ENG CORP LTD

Method and related apparatus for determining the location of ultrashort baseline lightning strikes in a multi-antenna monostatic three-dimensional layout.

This disclosure provides a method and related apparatus for determining the location of ultrashort baseline lightning strikes using a multi-antenna monostatic three-dimensional layout. The method utilizes a multi-antenna three-dimensional layout to construct one set of regular pentagonal interferometer arrays without angular error and multiple sets of equilateral triangular interferometer arrays with angular error by different combinations of antennas. The time difference between each VHF antenna of the same pulse signal is obtained by different antenna combinations. Two-dimensional observations without system error are performed using the regular pentagonal interferometer arrays. The two-dimensional observation results with system error obtained from the equilateral triangular arrays are corrected. Then, the two-dimensional information obtained from the regular pentagonal interferometer arrays is used as a reference, and the corrected two-dimensional information obtained from the multiple equilateral triangular interferometer arrays is intersected in three-dimensional space to obtain three-dimensional information. This disclosure can achieve ultra-high-resolution three-dimensional location determination for lightning discharges, and can achieve nanosecond time resolution and digital-meter order spatial resolution of the lightning discharge process.
Owner:NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS +1