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35 results about "Direct lightning strike" patented technology
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Receptor for wind turbine blade lightning protection
InactiveUS20120020791A1Reduce localized electrical field stressHigh dielectric strengthPropellersConnection to earthElectricityLightning strike
A receptor assembly for lightning protection of an object, such as a wind turbine blade, includes a receptor disk configured to be placed on a surface of the object, a receptor block insulator with an integral receptor block, a cover that engages the receptor block insulator, and a cap that engages the cover. The receptor disk and the receptor block may be made of electrically conductive materials, and the cover, and the cap, and the receptor block insulator may define a chamber among them that is lined with an electrically-conductive coating sandwiched between relatively high dielectric media to electrically isolate and shield internal parts of the receptor assembly from receiving a lightning strike directly.
Owner:ERICO INT
Protection against direct lightning strikes in riveted areas of cfrp panels
InactiveUS20100219287A1Reduce riskEliminate the problemInstallation of lighting conductorsAircraft lighting protectorsDirect lightning strikeMetal foil
The invention relates to a metalization structure of aircraft panels and process for obtaining such structure, such that it comprise a structure of a panel (1) made in composite material, the mentioned panel (1) comprising a metal mesh or foil (2) in its outer part, said panel (1) further comprising a bore which in turn comprises a shank and an upper countersinking (8), such that the mentioned panel (1) is fixed to another structural aircraft element (3) by means of metal fixing elements (4), characterized in that said structure comprise a metallization layer (7) arranged on the upper countersinking (8), extending in the adjacent area of the metal mesh or foil (2), such that it is ensured that electrical continuity exists between the upper countersinking (8) and the metal mesh or foil (2) during the time that the lightning bolt strikes the structure of the panel (1), further ensuring that most of the current discharged by the lightning bolt is conducted over the surface of the structure of the mentioned panel (1). The invention further relates to a process for making such structure of a panel (1).
Owner:AIRBUS OPERATIONS SL
Single-phase installation structure of parallel gap of 10kV distribution line and test method thereof
ActiveCN110445082AImprove induction lightning resistanceIncrease counter-thunder resistance levelTesting dielectric strengthSpatial arrangements/dispositions of cablesDirect lightning strikeEngineering
The invention discloses a single-phase installation structure of a parallel gap of a 10kV distribution line and a test method thereof. The structure comprises: in a 10kV distribution line, the parallel gap is only installed in one phase of the return line of the same base pole tower, the two parallel gaps of the left and right adjacent base pole towers are installed in the other two phases among the three phases respectively, and every three adjacent base pole towers are provided with a group of three parallel gaps. The method comprises simulating a single-phase installation structure in whichthe parallel gap is installed in a 10kV distribution line in simulation software, and obtaining an inductive lightning strike trip-out rate and a direct lightning strike counterattack trip-out rate of the 10kV distribution line of the single-phase installation structure of the parallel gap under an inductive lightning strike and a direct lightning strike. The single-phase installation structure can further improve the lightning withstand level of the 10kV distribution line, reduces its inductive lightning strike trip-out rate and improves the operational reliability of a distribution networkon the basis of protecting distribution equipment such as insulators.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Method for identifying direct lightning strike and inductive lightning strike of transmission line based on direct measurement of traveling wave
ActiveCN102539902AAccurate judgmentCriterion is simpleMeasurement using digital techniquesDirect lightning strikeTransient state
The invention provides a method for identifying a direct lightning strike and an inductive lightning strike of a transmission line based on direct measurement of a traveling wave. The method comprises the following steps; sampling and measuring the current of the transmission line by using a Rogowski coil; and accurately and concisely identifying whether a lightning strike is a direct lightning strike or an inductive lightning strike by analyzing whether a lightning traveling wave current is bifurcate at a wave tip, whether the polarities of a three-phase lightning traveling wave current are consistent, or the change trend of the amplitude of the lightning traveling wave current. By the method, the direct measurement of the lightning traveling wave is realized, the attenuation and the distortion of the traveling wave are avoided, the transient waveform of the lightning traveling wave current of the transmission line can be recorded completely and accurately, and the identifying accuracy is improved; and the method has the advantages of simple judgment criterion and easy implementation.
Owner:GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
Direct lightning strike protecting device of wind power generator set blade
InactiveCN101832234AAvoid or reduce lightning phenomenonAvoid chippingInstallation of lighting conductorsMachines/enginesDirect lightning strikeEngineering
The invention discloses a direct lightning strike protecting device of a wind power generator set blade, which comprises a power generator set blade, wherein an aluminum sheet is arranged in the power generator set blade in advance; a multi-discharge tip end is connected to the aluminum sheet, and both ends of the multi-discharge tip end extend out of the edge of the power generator set blade side; both ends of the multi-discharge tip end are in needle tooth shapes; and the aluminum sheet is grounded by a cable. The invention has the characteristics of effectively protecting the wind power generator set blade, preventing earth charge from accumulating on the blade by high-frequency and small-energy tip end discharge and preventing or reducing the direct lightning strike from directly striking the blade.
Owner:SHANDONG MASTER ELECTRIC
Protection against direct lightning strikes in riveted areas of CFRP panels
InactiveUS8186614B2Reduce riskEliminate the problemInstallation of lighting conductorsAircraft lighting protectorsDirect lightning strikeElectricity
A metalization structure of aircraft panels and process for obtaining such structure including a panel made in composite material, the panel including a metal mesh or foil in its outer part, said panel further including a bore which in turn comprises a shank and an upper countersinking, such that the mentioned panel is fixed to another structural aircraft element by means of metal fixing elements. The structure includes a metallization layer arranged on the upper countersinking, extending in the adjacent area of the metal mesh or foil, such that it is ensured that electrical continuity exists between the upper countersinking and the metal mesh or foil during the time that the lightning bolt strikes the structure of the panel, further ensuring that most of the current discharged by the lightning bolt is conducted over the surface of the structure of the panel.
Owner:AIRBUS OPERATIONS SL
Multichannel comprehensive thunder and lightning monitor
ActiveCN103267890AMonitor working statusMonitor voltage valueEarth resistance measurementsMeasurement using digital techniquesOvervoltageData information
Owner:成都东方瀚易科技发展有限公司
Conductor lightning protection device
InactiveCN107994534APrevent burnoutImprove lightning protection effectConnection to earthDischarge by conduction/dissipationDirect lightning strikeGround line
The invention discloses a conductor lightning protection device which comprises a lightning protection device body and a conductor clamp holder. A first containing hole and a second containing hole are formed in the middle of the conductor clamp holder, a positioning bump is arranged between the first containing hole and the second containing hole, steel pricks are arranged inside the first containing hole and the second containing hole, a conductor penetrates the first containing hole and the second containing hole, a metal block is arranged on one side of the top of the conductor clamp holder, a discharge disk is arranged at the top of the metal block and connected with the metal block in a fastened manner by a screw, and an arc extinguishing cylinder is arranged at the top of the discharge disk. According to the conductor lightning protection device, arc extinguishing time is shortened by the arc extinguishing cylinder, burnout of the conductor is avoided by double voltage divisionof a discharge device and a grounding wire, the lightning protection effect of the device is further improved, the conductor is indirectly protected from long-time direct lightning strike, the conductor lightning protection device is good in durability, low in maintenance cost, high in reliability and long in service life, and a shield is omitted.
Owner:STATE GRID JIANGXI ELECTRIC POWER CO +1
Direct lightning strike protection device and its protection evaluation method for shipborne shortwave communication system
ActiveCN110336131BSolve the problem of encountering direct lightning strikesSolution to short lifeSpark gap detailsDesign optimisation/simulationDirect lightning strikeCommunications system
The invention discloses a direct lightning strike protection device for a shipborne short-wave communication system, which comprises an outer insulating cylinder, an outer upper electrode, an inner upper electrode, an outer lower electrode and an inner lower electrode. The outer insulating cylinder is provided with a hollow chamber and its top end and The bottom ends are provided with openings, the inner upper electrode and the inner lower electrode are located above and below the outer insulating cylinder chamber respectively, one end of the outer upper electrode is inserted into the inner chamber to connect with the inner upper electrode, and one end of the outer lower electrode is inserted into the inner chamber Connected with the inner lower electrode, the outer upper electrode and the inner upper electrode are provided with interconnected air outlet channels, and the outer lower electrode and inner lower electrode are each provided with interconnected air intake channels. The invention also discloses a protection evaluation method of the direct lightning strike protection device of the ship-borne short-wave communication system. The ship-borne short-wave communication system direct lightning protection device solves the problem that the short-wave communication system may encounter direct lightning strikes because the whip antenna is outside the protection range of the ship's lightning rod.
Owner:CHINA SHIP DEV & DESIGN CENT
Direct lightning analyzing method for high speed railway and adopting traction network three-dimensional exposure arc surface projection area calculation
ActiveCN103745102APerfecting the Analysis Theory of Lightning DamageImprove targetingSpecial data processing applicationsDirect lightning strikeVertical projection
A direct lightning analyzing method for a high speed railway and adopting traction network three-dimensional exposure arc surface projection area calculation basically includes the following steps: (1) acquiring basic line information of the high speed railway, dividing spans with consistent span length, high level bridge structure height, traction network electric and geological structure characteristic parameters into a class, conducting statistics on lightning activity parameters along the line, and enabling the parameters to correspond to the spans of different classes; (2) building a three-dimensional lightning model of a span of the class i according to the traction network characteristic parameters of the class i, calculating the vertical projection area and the direct lightning striking probability of the traction network three-dimensional exposure arc surface, and combining the lightning parameters of the spans to calculate the comprehensive direct lightning striking probability and the year direct lightning trip-out rate of all the spans of the class i; (3) repeating the step (2) to calculate the comprehensive lightning striking probability and the year direct lightning trip-out rate of traction networks of all classes; (4) calculating the comprehensive direct lightning striking probability and the year direct lightning trip-out rate of the full line. By means of the method, the pertinence and the effectiveness of high speed railway direct lightning protection can be improved.
Owner:STATE GRID CORP OF CHINA +2
Roof fan device and system suitable for whole environment
PendingCN114294169AAffect the service lifeAffects Noise PollutionWind energy with electric storagePV power plantsDirect lightning strikePillow block bearing
The invention relates to a roof all-environment applicable fan device and system, which comprises a mounting frame, a plurality of air deflectors, a generator, a noise reduction case, a magnetic suspension electric suction assembly and a heating and deicing assembly, the noise reduction case is mounted in the mounting frame, the generator is fixedly mounted in the noise reduction case, a first flange is mounted on an output shaft of the generator, and a second flange is mounted on the output shaft of the generator. The magnetic suspension electric suction assembly is installed on the installation frame, a bearing seat is installed on the installation frame, a rotating shaft is rotationally arranged in the bearing seat, a second flange is fixed to one end of the rotating shaft, a third flange is fixed to the other end of the rotating shaft, and the air guide plate is installed between the first flange and the second flange and provided with a cyclone adjusting opening. The cyclone adjusting port is provided with a cyclone adjusting blade, the noise reduction case and the mounting frame are provided with a heating and deicing assembly, and the mounting frame is provided with an induction lightning rod, so that the device has the advantages of direct lightning stroke prevention, safety protection, noise pollution prevention and freeze injury prevention, and breaks through the bottleneck that the installation of a fan on a building roof is limited due to potential safety hazards.
Owner:桐庐恒新金属科技有限公司
Method for evaluating direct lightning strike protection effect of lightning arrester spacer configuration for overhead line
ActiveCN110346636AImprove the protective effectGood direct lightning protectionCurrent/voltage measurementDirect lightning strikeEvaluation result
The embodiment of the invention discloses a method for evaluating a direct lightning strike protection effect of lightning arrester spacer configuration for an overhead line. The method comprises thesteps of classifying lightning strike conditions into a lightning strike on a wire, a lightning strike on one tower free of protection of a lightning arrester and a lightning strike on one tower underthe protection of the lightning arrester; building a lightning strike rate calculation model for the distance from a lightning strike point to the tower on which the lightning arrester is arranged; calculating line lightning withstand levels, probabilities of exceeding the line lightning withstand levels, lightning strike tripping rates and lightning strike tripping times of the lightning strikeon the wire, the lightning strike on the tower free of the protection of the lightning arrester and the lightning strike on the tower under the protection of the lightning arrester in sequence according to the lightning strike rate calculation model, wherein the lightning strike tripping times are obtained through a span integral calculation model; and finally obtaining the sum of the lightning strike tripping times of the lightning strike on the wire, the lightning strike on the tower free of the protection of the lightning arrester and the lightning strike on the tower under the protection of the lightning arrester. The method can be programmatically implemented and is convenient and fast, and the evaluation result is small in error.
Owner:GUANGDONG POWER GRID CO LTD +1
Multichannel comprehensive thunder and lightning monitor
ActiveCN103267890BMonitor working statusMonitor voltage valueEarth resistance measurementsMeasurement using digital techniquesOvervoltageComputer monitoring
The invention relates to the field of lightning monitoring and early warning, in particular to a multi-channel comprehensive lightning monitoring instrument. The multi-channel integrated lightning monitor includes multiple lightning pulse sensors, overvoltage / overcurrent protection circuits, amplitude conversion circuits, real-time numerical sampling modules, processors, data storage, clock circuits, monitoring and control systems, and power supply circuits. The signal output terminal of the lightning pulse sensor is connected in series with an overvoltage / overcurrent protection circuit, an amplitude conversion circuit, a real-time numerical sampling module, and a processor in sequence, and the processor is also respectively connected with a clock circuit, a data memory, and a monitoring and control system. The invention can accurately record the waveform, amplitude, frequency and occurrence time of the surge voltage generated by direct lightning strike induction in multiple areas, and can also monitor the working status of the remote lightning protection device with remote signaling function in real time And real-time monitoring of the voltage value between zero and ground, and detection of grounding resistance. Relevant data information can be displayed in real time through the local monitor, and the data can also be transmitted to the remote computer through the serial port line to realize computer viewing and computer monitoring.
Owner:成都东方瀚易科技发展有限公司
Elevator control device
A weather information detection device (15) for detecting information on weather. An elevator control device (11) conducts controlled operation in accordance with weather information detected by the weather information detection device (15). The controlled operation avoids a passenger cage (1) being affected directly by change of weather. For example, the elevator control device (11) detects approach of thunder cloud by a lightning detection device (15a) of the weather detection device (15). When there is a possibility of a lightning strike in the vicinity of the elevator, the passenger cage (1) is evacuated by the elevator control device (11) to an evacuation floor (8) free from influence of a direct lightning strike. Thus passenger safety is secured and damage to the passenger cage can be prevented.
Owner:TOSHIBA ELEVATOR KK
Method and device for complete protection against direct lightning strikes in small wind farms
Owner:周志强 +1
A Ground Mobile Direct Lightning Protection System
ActiveCN111092404BQuick groundReliable groundingDischarge by conduction/dissipationEmergency protective arrangements for limiting excess voltage/currentAutomatic controlEngineering
A ground mobile direct strike lightning protection system, including lightning monitoring and early warning system, lightning receiving device, lifting system, grounding system and automatic control system; the lightning monitoring and early warning system monitors the atmospheric electric field environment around special vehicles in real time; the automatic control system is based on The monitoring data of the lightning monitoring and early warning system activates the corresponding level of early warning; according to the situation, it sends a rising or falling signal to the lifting system and the lightning receiving device, and sends a grounding start signal or an end grounding signal to the grounding system; Stand upright to enter the direct lightning lightning receiving mode or fold down to put it away; the lifting system rises or falls according to the received signal; the grounding system quickly and reliably grounds or withdraws special vehicles that are in the process of moving or temporarily parked in the field. The invention can provide effective direct lightning protection for special vehicles in the process of moving or under the condition of temporary parking in the field.
Owner:BEIJING INST OF ASTRONAUTICAL SYST ENG +1
Discrimination method of direct lightning strike and induction lightning based on optical integrated electric field sensor
ActiveCN108414843BEasy to installEasy to measureElectromagentic field characteristicsElectric field sensorDirect lightning strike
The invention relates to a direct thunder and inductive thunder discrimination method based on an optical integrated electric field sensor, and belongs to the technical field of fault recognition. According to the method, the three-phase independent lightning overvoltage of the two ends of the insulator is separated from the original waveform through the method of filtering, overvoltage extractionand decoupling based on the measurement data of the optical integrated electric field sensor, and the direct thunder and the inductive thunder are discriminated according to the polarity of the three-phase lightning overvoltage. The method is verified by practice and has the advantages of being convenient to install and test and high in fault recognition rate.
Owner:ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
Single-phase installation structure and test method for parallel gap of 10kv distribution line
ActiveCN110445082BImprove the insulation levelInductive lightning trip rate reducedTesting dielectric strengthSpatial arrangements/dispositions of cablesDirect lightning strikeTower
The invention discloses a single-phase installation structure of a parallel gap of a 10kV distribution line and a test method thereof. The structure comprises: in a 10kV distribution line, the parallel gap is only installed in one phase of the return line of the same base pole tower, the two parallel gaps of the left and right adjacent base pole towers are installed in the other two phases among the three phases respectively, and every three adjacent base pole towers are provided with a group of three parallel gaps. The method comprises simulating a single-phase installation structure in whichthe parallel gap is installed in a 10kV distribution line in simulation software, and obtaining an inductive lightning strike trip-out rate and a direct lightning strike counterattack trip-out rate of the 10kV distribution line of the single-phase installation structure of the parallel gap under an inductive lightning strike and a direct lightning strike. The single-phase installation structure can further improve the lightning withstand level of the 10kV distribution line, reduces its inductive lightning strike trip-out rate and improves the operational reliability of a distribution networkon the basis of protecting distribution equipment such as insulators.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Intelligent multi-layer gap overvoltage protector based on graphite-metal coating material
ActiveCN113629686AGood weldabilityReduce in quantityEmergency protective arrangements for limiting excess voltage/currentEngineeringElectric power
The invention discloses an intelligent multi-layer gap overvoltage protector based on a graphite-metal coating material, which is composed of a plurality of graphite-metal combined electrodes, wherein each electrode is insulated and isolated by an insulating medium, a trigger electrode is designed at the lowest electrode gap of the multi-layer gap of the graphite-metal coating, and the trigger electrode can automatically sense, couple and receive energy of lightning overvoltage and trigger rapid conduction of the multi-layer gap, so that the three-terminal overvoltage protection gap of the multi-layer gap structure has the remarkable characteristics of high direct-current breakdown voltage, high voltage protection level, short response time, high power frequency or direct-current subsequent current resistance and the like, and the intelligent multi-layer gap overvoltage protector can be used for direct lightning stroke and lightning induction overvoltage protection in application occasions such as the communication field and even the electric power field.
Owner:XI AN JIAOTONG UNIV
Lightning protection system for photovoltaic power station and photovoltaic power station
ActiveCN111277201BSolve the problem of small lightning protection rangeIncreased protectionInstallation of lighting conductorsPV power plantsDirect lightning strikeLightning rod
Embodiments of the present invention disclose a lightning protection system for a photovoltaic power station and a photovoltaic power station. The photovoltaic power station includes a photovoltaic array, the photovoltaic array includes a plurality of photovoltaic components, and the lightning protection system includes: a lightning rod array, and the lightning rod array includes a plurality of lightning rods, a plurality of lightning rods Set on the photovoltaic array, the maximum distance between adjacent lightning rods is the first spacing; the balls are placed on adjacent and equal height lightning rods, the first spacing and the radius of the rolling balls and the penetration of the rolling balls relative to the corresponding lightning rods Depth is related, the radius of the rolling ball is related to the lightning protection level of the photovoltaic power station, and the penetration depth is less than or equal to the length of the corresponding lightning rod. The technical solutions provided by the embodiments of the present invention can solve the problem that only one lightning rod is used for the entire photovoltaic power station, resulting in a small lightning protection range, can effectively reduce the number of lightning rods, reduce the cost of photovoltaic power stations, and increase direct lightning strikes for frameless double-glass photovoltaic modules. protective function.
Owner:HEFEI SUNGROW RENEWABLE ENERGY SCI & TECH CO LTD
Direct lightning protection device of shipborne short-wave communication system and protection assessment method thereof
ActiveCN110336131ASolution to short lifeStable breakdown thresholdSpark gap detailsDesign optimisation/simulationDirect lightning strikeInlet channel
The invention discloses a direct lightning protection device of a shipborne short-wave communication system. The device comprises an external insulating cylinder, an external upper electrode, an internal upper electrode, an external lower electrode and an internal lower electrode, wherein the external insulating cylinder is provided with a hollow cavity, and the top end and the bottom end of the external insulating cylinder are provided with open holes; the internal upper electrode and the internal lower electrode are respectively positioned above and below the cavity of the external insulating cylinder; one end of the external upper electrode is inserted into the cavity and is connected with the internal upper electrode; one end of the external lower electrode is inserted into the cavityand is connected with the internal lower electrode; the external upper electrode and the internal upper electrode are respectively provided with air outlet channels which communicate with each other;and the external lower electrode and the internal lower electrode are respectively provided with air inlet channels which communicate with each other. The present invention further discloses a protection assessment method of the direct lightning protection device of the shipborne short-wave communication system. The direct lightning protection device of the shipborne short-wave communication system solves the problem that direct lightning strike is possible due to the fact that the whip antenna in the short-wave communication system is located outside the protection range of the lightning rodon the ship.
Owner:CHINA SHIP DEV & DESIGN CENT
High-weldability intelligent multi-layer gap overvoltage protector based on copper-chromium alloy material
PendingCN113872173AHigh hardnessHigh wear resistance and anti-knockEmergency protective arrangement detailsEmergency protective arrangements for limiting excess voltage/currentMetallurgyEngineering
The invention discloses a high-weldability intelligent multi-layer gap overvoltage protector based on a copper-chromium alloy material, which is characterized in that a multi-layer discharge gap formed by a plurality of electrodes made of the copper-chromium alloy material is arranged in an insulating shell, each electrode is insulated and isolated by an insulating medium, a trigger electrode is designed at the lowest electrode gap of the multi-layer gap, and the trigger electrode can automatically sense, couple and receive energy of lightning overvoltage and trigger the lowest electrode gap of the multi-layer gap and other gaps to be quickly conducted, so that the three-terminal overvoltage protection gap with the multi-layer gap structure has the remarkable characteristics of high direct current breakdown voltage, high voltage protection level, short response time, high power frequency or direct current follow-up current resistance and the like. The intelligent multi-layer gap overvoltage protector can be used for protection of direct lightning stroke and lightning induction overvoltage in application occasions such as the communication field and even the electric power field.
Owner:XI AN JIAOTONG UNIV
A Calculation Method for the Trip Rate of 35kV and Below Distribution Lines Directly Struck by Lightning
ActiveCN105160049BGuaranteed accuracyGuarantee authoritySpecial data processing applicationsDirect lightning strikeTransient state
The invention relates to a method for calculating the direct lightning tripping-out rate of a distribution line up to 35kV. In the method, firstly, the lightning damage condition of the region where the distribution line is arranged, and the line parameters and the tower parameters are obtained, and the probability of the event that the lightning current hits the towers and the probability of the event that the lightning current hits the wires are obtained. Secondly, in view of the special neutral point grounding manner of the distribution line, when the lightning current directly hits wires, and two phase flashover and three phase flashover of insulators occur, and the amplitude of the lightning current is calculated through a brand new formula. the simulation model that the lightning current hits towers and lightning conductors under the condition of a specific tower shape and a specific loop is established by means of electromagnetic transient simulating calculation software, the amplitude of the lightning current which causes two phase flashover and three phase flashover of the insulators is obtained, furthermore, the straight hit tripping-out rate is calculated through a new formula, the back flashover tripping-out rate is calculated through a new formula, and by adding the straight hit tripping-out rate to the back flashover tripping-out rate, the total straight hit tripping-out rate can be obtained. The method for calculating the direct lightning tripping-out rate of the distribution line up to 35kV is suitable for calculating the tripping-out rate of the distribution line under the condition of different tower shapes and loops, and can provide basis to lightning damage assessment and line reconstruction.
Owner:STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +2
High-weldability controllable multi-layer gap overvoltage protector based on copper-chromium alloy
ActiveCN113612211AGood weldabilityImprove conductivityEmergency protective arrangements for limiting excess voltage/currentOvervoltageHemt circuits
The invention discloses a high-weldability controllable multi-layer gap overvoltage protector based on copper-chromium alloy, and the overvoltage protector consists of a fixed multi-layer gap, a controllable multi-layer gap, and an intelligent controllable switch. According to the overvoltage protection gap of the engineering multi-layer structure, which is manufactured by using the high and good electric conduction and heat conduction performance, high hardness, wear resistance, explosion resistance, machinability and weldability of the copper-chromium alloy, the automatic overvoltage coupling trigger circuit of the intelligent controllable switch can automatically couple overvoltage energy to output a trigger pulse; and the three-electrode discharge switch of the intelligent controllable switch is switched on, so that the controllable part of the multi-layer gap is short-circuited, and the overvoltage gap of the multi-layer structure has the remarkable characteristics of high alternating-current and direct-current withstand voltage, high lightning voltage protection level, short response time, high power frequency or direct-current follow-up current resistance and the like. The overvoltage protector can be used for direct lightning stroke and lightning induction overvoltage protection in application occasions such as the communication field and even the electric power field.
Owner:XI AN JIAOTONG UNIV
Direct lightning strike protecting device of wind power generator set blade
InactiveCN101832234BAvoid or reduce lightning phenomenonAvoid chippingInstallation of lighting conductorsMachines/enginesDirect lightning strikeElectrical and Electronics engineering
The invention discloses a direct lightning strike protecting device of a wind power generator set blade, which comprises a power generator set blade, wherein an aluminum sheet is arranged in the power generator set blade in advance; a multi-discharge tip end is connected to the aluminum sheet, and both ends of the multi-discharge tip end extend out of the edge of the power generator set blade side; both ends of the multi-discharge tip end are in needle tooth shapes; and the aluminum sheet is grounded by a cable. The invention has the characteristics of effectively protecting the wind power generator set blade, preventing earth charge from accumulating on the blade by high-frequency and small-energy tip end discharge and preventing or reducing the direct lightning strike from directly striking the blade.
Owner:SHANDONG MASTER ELECTRIC
Test method, test circuit and design method of withstand characteristic of lightning protection insulator
ActiveCN111352011BSecurity Technical SupportReliable technical supportTesting dielectric strengthDirect lightning strikeEngineering
The disclosure relates to a test method, a test circuit and a design method for the withstand characteristic of a lightning protection insulator. The test method includes acquiring the impact energy absorbed by the entire lightning protection insulator under the first impulse current wave; acquiring the impact energy under the second impulse current wave current and corresponding thermal stress; respectively obtain the power frequency reference voltage and leakage current corresponding to the first and second surge current waves; adjust the surge current applied to the entire lightning protection insulator according to the change rate of the power frequency reference voltage and the comparison result of leakage current ; Perform the above steps in a loop until the power frequency reference voltage change rate is less than or equal to the set rate of change, and the leakage current is less than or equal to the set leakage current. subject to the maximum value. Through the technical proposal of the present disclosure, the response characteristics of the entire lightning protection insulator when it is directly struck by a large current are truly simulated.
Owner:HUNAN XIANGDIAN POWER TEST & RES TECH LTD
A Lightning Risk Assessment Method for Overhead Distribution Lines Based on Electrical Geometric Model
ActiveCN110309527BReflect the concept of lightning protectionEasy to calculateDesign optimisation/simulationResourcesDirect lightning strikeOvervoltage
Owner:WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST
Method for identifying direct lightning strike and inductive lightning strike of transmission line based on direct measurement of traveling wave
ActiveCN102539902BAccurate judgmentCriterion is simpleMeasurement using digital techniquesDirect lightning strikeTransient state
The invention provides a method for identifying a direct lightning strike and an inductive lightning strike of a transmission line based on direct measurement of a traveling wave. The method comprises the following steps; sampling and measuring the current of the transmission line by using a Rogowski coil; and accurately and concisely identifying whether a lightning strike is a direct lightning strike or an inductive lightning strike by analyzing whether a lightning traveling wave current is bifurcate at a wave tip, whether the polarities of a three-phase lightning traveling wave current are consistent, or the change trend of the amplitude of the lightning traveling wave current. By the method, the direct measurement of the lightning traveling wave is realized, the attenuation and the distortion of the traveling wave are avoided, the transient waveform of the lightning traveling wave current of the transmission line can be recorded completely and accurately, and the identifying accuracy is improved; and the method has the advantages of simple judgment criterion and easy implementation.
Owner:GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
Remote lightning protection detection system
InactiveCN107271820AImprove functionalityImprove reliabilityEarth resistance measurementsElectrical testingTransceiverSoftware development
The invention discloses a remote lightning protection detection system, which mainly includes a direct lightning strike detector, a grounding resistance detector, a storage module, a power supply module, a central processing unit, a GSM module, a power circuit breaker, and a signal line circuit breaker; the central The processor is also connected with the GSM module, the direct lightning strike detector, the grounding resistance detector and the storage module circuit respectively; the GSM module includes a TC35I chip, a voice prompt module, a display port, and a dual audio decoding transceiver. The TC35I chip of the present invention has good functionality and high reliability, and is convenient for hardware circuit design and software development; the dual audio decoding transceiver can realize the transmission of Chinese short messages, and send the detection data exceeding the standard to the display port; the voice prompt module sends the control process to The voice prompt method confirms the identity and confirms the function code, and controls the operation after confirming the identity; it can also realize real-time monitoring, find problems in time, and carry out maintenance in time, which is safer and more reliable.
Owner:广西维泰气象科技有限公司
A method for judging fault types of lightning current in transmission lines
ActiveCN110927529BEasy to monitorEnsure safe power supplyFault location by conductor typesDirect lightning strikePower grid
The invention relates to a method for judging the fault type of a lightning current of a transmission line, which relates to the technical field of lightning strike fault identification of a transmission line. The purpose of the invention is to accurately judge the fault type in the operation of the existing power grid. In the present invention, the sensor installed on the top of the tower directly measures the direct lightning strike, and the sensor installed on the three-phase line indirectly measures the lightning current propagating along the line. The key parameters of the system are accumulated, and by analyzing the measurement data, the fault type of the tower is judged.
Owner:HARBIN INST OF TECH +1
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