164 results about "Lightning protection system" patented technology

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

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

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

The invention relates to the technical field of fan detection, and discloses a device and method for testing a fan blade lightning protection system based on an unmanned aerial vehicle, and the device comprises a self-balancing system, a telescopic rod device, a flexible connection device, and a detection device. The self-balancing system is installed between the unmanned aerial vehicle and the telescopic rod device, and when the unmanned aerial vehicle operates in the air, the telescopic rod device can rotate left and right, and the telescopic rod device is kept at the horizontal position all the time; the detection device comprises a resistance testing device, a polishing probe and a detection probe, the detection device is arranged at the front end of the telescopic rod device and used for being adsorbed to the surface of the blade and stretching out of the polishing probe to make contact with the surface of the lightning arrester, and after polishing work is completed, the detection probe stretches out and retracts the polishing probe, and the detection probe makes contact with the surface of the lightning arrester. The resistance testing device is used for testing the resistance between the lightning arrester and the blade root; one end of the flexible connection device is connected with the telescopic rod device, and the other end is connected with the detection device. According to the invention, the test is stable, reliable and more accurate.

The foldable supporting device for the offshore platform lightning protection system comprises a supporting bottom plate, a U-shaped limiting support is fixed to the tail of the supporting bottom plate, the lower portion of a main supporting frame is rotationally connected between a left side wing plate and a right side wing plate of the U-shaped limiting support, a lightning rod is fixed to the top of the main supporting frame, and the U-shaped limiting support is fixed to the tail of the supporting bottom plate. Motor supporting bases are fixed to the supporting bottom plate, a servo motor is fixed to the motor supporting base on the left side, and folding of the lightning rod is adjusted through the servo motor. According to the device, the lightning rod can be folded in an environment with better natural conditions, so that the quality and the performance of the lightning rod are ensured; when lightning protection is needed, the device is unfolded through signal control, and the lightning rod is erected to work vertically, so that the lightning rod can be protected, the maintenance cost is reduced, the lightning protection quality is improved, and an important electrical working system on an offshore platform can be protected.

The hectometer-level wind power blade lightning protection system comprises a blade tip shell, the blade tip shell comprises an SS face and a PS face opposite to the SS face, a blade tip metal net is laid at the end, close to the blade tip shell, of the SS face, and one end of the blade tip metal net is connected with the blade tip shell through a blade tip metal disc; the other end of the blade tip metal net is connected with a wire of the blade root lightning protection assembly through the grounding metal net assembly and the lightning arrester. The lightning arrester is mounted on the grounding metal base; the metal base is arranged in the blade tip shell and attached to the inner wall of the blade tip shell. The blade tip shell, the blade tip metal net and the wire of the whole lightning protection system are reliably connected through the grounding metal net assembly and the lightning arrester to form a conductive channel. According to the lightning protection system, reliable connection of the metal net, the blade tip and the wire is achieved, the structure is compact, the aerodynamic performance of the blade is not affected, large-current conduction is achieved, the positioning precision requirement during installation of the lightning arrester can be lowered, and the lightning protection reliability of the hectometer-level blade is improved to a greater extent.

The invention provides a fan blade lightning protection conduction testing method and system based on machine learning, and relates to the technical field of lightning protection conduction testing, and the method comprises the steps: carrying out the current testing of a fan blade lightning protection system through a multi-channel MOS tube control circuit; performing multi-dimensional feature extraction and local feature analysis on the current response data; carrying out feature enhancement and defect identification based on the local feature sequence, and carrying out multistage clustering on an identification result; and performing global health analysis and defect traceability of lightning protection conduction performance on the fan blade lightning protection system according to a defect classification result, generating a defect attribution point location for monitoring, performing feedback optimization on a multi-channel MOS tube control circuit, and constructing a test optimization closed loop. According to the invention, the technical problem that the lightning protection conduction test efficiency is low due to the fact that the static conduction test is difficult to identify early hidden defects in the prior art is solved, the current test is carried out through the multi-channel MOS tube control circuit, and the lightning protection conduction test efficiency is improved.

The invention discloses a lightning protection monitoring alarm system, and relates to the technical field of lightning protection monitoring, and the system comprises a monitoring data analysis unit which is used for analyzing the multi-source data transmitted by a lightning protection monitoring data collection unit, judging the operation condition of a lightning protection system according to the state data of the lightning protection system, and generating a normal or abnormal signal of the lightning protection system, meanwhile, analyzing the lightning risk analysis signal, determining abnormal data, generating a grounding abnormal analysis signal or a lightning risk analysis signal, and then respectively transmitting the two signals. The lightning protection monitoring and alarming system integrates four types of multi-source data including lightning parameters, lightning protection facility states, environmental meteorology and equipment operation instead of single data monitoring, can avoid the problem of'data isolated island ', judges the state of the lightning protection system from multiple dimensions including lightning impulse, facility performance, environmental influence and equipment operation, provides more comprehensive data support for subsequent analysis, and improves the reliability of the system. The problem of judgment one-sidedness caused by the fact that traditional monitoring only depends on single data is solved.

The invention discloses an ancient building lightning protection system and method based on a lightning early warning device, and belongs to the technical field of lightning protection systems, and the system comprises a sensing layer, a decision layer, an execution layer and a digital twin platform. The sensing layer collects multi-mode environmental parameters through an annular atmospheric electric field monitoring array, a broadband electromagnetic pulse sensor and a meteorological sensor. The decision-making layer fuses data and outputs four levels of risk levels through the risk prediction model of the ancient building LSTM combined attention mechanism, and generates a protection instruction; and the execution layer adopts a bionic hidden lightning receiving device (hidden in a non-working state), a passive corona field lightning driving device and a multi-stage historic building SPD, and responds according to a grading strategy. The digital twin platform constructs a high-precision model, and realizes data visualization and protection strategy simulation optimization. Passive lightning protection is converted into active intelligent protection, the situation that a traditional device destroys the style and appearance of an ancient building is avoided, secondary damage caused by lightning stroke is reduced, self-learning optimization can be achieved, and the requirements for safety and cultural relic protection are met.

A pitch-controlled wind turbine comprising a tower, a nacelle mounted on the tower, a hub rotatably mounted on the nacelle, and at least three wind turbine blades wherein each wind turbine blade extends between a root end and a tip end, the root end being connected to the hub via a pitch mechanism; the wind turbine further comprises at least three blade connection members, each blade connection member extending from a connection point on one wind turbine blade towards a connection point on an adjacent wind turbine blade, wherein the connection points on a given wind turbine blade are arranged at a distance from the root end of the wind turbine blade and at a distance from the tip end of the wind turbine blade; each wind turbine blade comprising an outboard portion extending the distance from a tip end of the wind turbine blade to the connection point, and an inboard portion extending the distance from a root end of the wind turbine blade to the connection point; wherein the wind turbine further comprises a lightning strike protection system, and each blade connection member has an electrically conductive material configured to conduct lightning current from an outboard portion of the wind turbine blade from which the connection member extends and along a path extending with the blade connection member towards the tower.

A lightning protection system for the joint of a modular blade. The joint comprises a number of coated metal elements by Xpacer equipotentially bonded with a number of stacks disposed at the sides of the upper cap and the lower cap and with the lightning down-drop. The preforms of the joint include two stacks at the leading edge and another two stacks at the trailing edge. The stacks are formed by layers of carbon fibre and layers of glass fibre, replaced by copper mesh as from the equipotentiation line. The stack incorporates at the side thereof a metal strip joined to the metal strip that links the tip cap and the root cap, and is coated with a layer of glass fibre.

A lightning protection system for an aluminum-magnesium-manganese upright lockrand metal roof comprises a lightning protection copper strip and a Z-shaped metal guide sheet, and is characterized in that the lightning protection copper strip is fixed on a secondary purlin and a purlin support; one end of the Z-shaped metal guide piece is installed on the aluminum alloy support, the other end of the Z-shaped metal guide piece is fixed to the secondary purline, the conductive effect from the aluminum alloy support to the secondary purline is guaranteed, the lightning protection folding piece is covered with the cut TPO waterproof roll, and water leakage is prevented. The lightning protection system for the aluminum-magnesium-manganese upright lockrand metal roof has the advantages that during installation of the secondary purlins of the roof, the lightning protection copper strips are installed between the secondary purlins and the purlin supports, and the conductive metal blocks are installed on the aluminum alloy supports of the roof panels, so that a large conductive section is formed, the conductive effect is enhanced, and the service life of the roof is prolonged. The problems of time-consuming, labor-consuming and high-cost lightning protection measures of frequent lightning protection construction are solved, and the lightning protection requirement is effectively ensured.

The utility model relates to the field of blade lightning protection systems, and particularly discloses a novel blade lightning protection system grounding metal net connecting structure which comprises a main metal net laid on the surface of a blade, a grounding structure metal net attached to the main metal net, a grounding structure metal plate arranged on one side of the grounding structure metal net and a lightning arrester. The grounding structure metal plate is of a thin plate structure and comprises a first metal plate body and a second metal plate body, the first metal plate body and the second metal plate body are located on the two sides of the grounding structure metal net respectively, and the first metal plate body and the second metal plate body are oppositely arranged. The lightning arrester sequentially penetrates through the first metal plate, the grounding structure metal net and the second metal plate.

The embodiment of the invention discloses an intelligent lightning protection system for fan blade deicing control equipment, which comprises a lightning protection system body, a system state monitoring system and a comprehensive intelligent lightning protection management system, and is characterized in that the lightning protection system body consists of a grounding module, a shielding module and a surge protection module; a basic guarantee effect is achieved on a comprehensive intelligent lightning protection management system; the system state monitoring system is composed of a lightning discharge detection module and a surge protector state monitoring module and plays an auxiliary supporting role in the comprehensive intelligent lightning protection management system. The comprehensive intelligent lightning protection management system is used for realizing man-machine interaction between lightning protection equipment and operation and maintenance personnel and providing decision reference for daily operation, maintenance and management of a fan blade deicing control system. According to the method, the actual operation environment of the fan is fully considered, a lightning protection design scheme is provided in a targeted mode, and the method has the advantages of being large in lightning protection margin, high in system state sensing capacity and high in fault monitoring and early warning speed.

The present invention relates to the field of wind turbine detection technology, and discloses a wind turbine blade lightning protection system testing device and method based on an unmanned aerial vehicle (UAV). The testing device includes a self-balancing system, a telescopic rod device, a flexible connection device, and a detection device. The self-balancing system is installed between the UAV and the telescopic rod device. When the UAV is operating in the air, the telescopic rod device can rotate left and right, and the telescopic rod device always remains in a horizontal position. The detection device includes a resistance test device, a grinding probe, and a detection probe. The detection device is arranged at the front end of the telescopic rod device and is used to be adsorbed on the blade surface. The grinding probe is extended and retracted to contact the surface of the lightning receptor. After the grinding work is completed, the detection probe is extended and retracted, and the detection probe contacts the surface of the lightning receptor. The resistance test device tests the resistance between the lightning receptor and the blade root. The flexible connection device is connected to the telescopic rod device at one end and connected to the detection device at the other end. The present invention can make the test stable, reliable, and more accurate.

The invention relates to the technical field of power transmission line lightning protection, in particular to an active and passive cooperative lightning protection system and method for a power transmission line, and aims to judge whether lightning affects the power transmission line or not, perform early warning on the power transmission line with a lightning stroke risk, and execute corresponding active lightning protection measures; according to lightning activity data of an electric field and related data of previous lightning strokes of the electric field, on the other hand, the power transmission lines are divided into different risk levels, passive lightning protection measures are taken for the different power transmission lines according to the corresponding risk levels, and the passive lightning protection effect of the power transmission lines is improved; the lightning protection effect of the power transmission line is further improved, and the actual operation lightning protection requirement is met.

An insulated blade tip (11) for a lightning protection system in a wind turbine blade (5) is described. The described insulated blade tip (11) comprises: an electrically conductive receiver unit (12) having an outer portion (121) and an inner portion (122), where the outer portion (121) forms a lightning receiver; a lightning protection cable (13) electrically connected to the inner portion (122) and configured for connection to an insulated cable in order to conduct lightning from the insulated blade tip (11) to a blade root of the wind turbine blade (5); an electrically insulating block (14) having an inner cavity (16) in which the inner portion (122) and the lightning protection cable (13) are placed. The outer portion (121) is arranged at a first outer surface (1411) of the electrically insulating block (14). Furthermore, a space (19) between (i) the inner portion (122) and / or the lightning protection cable (13) and (ii) the inner surface (171, 181) of the cavity (16) is at least partially filled with a resin (20). Furthermore, a method for producing such an insulated blade tip (11) and a wind turbine blade (5) with such an insulated blade tip (11) and a wind turbine (1) are described.

The present invention relates to a lightning protection system based on Coulomb's law, belonging to the field of lightning prevention technology. It comprises: a lightning conductor and a discharge ground wire for attracting lightning to a predetermined lightning strike object; an energy storage capacitor for charging the lightning conductor; a high-voltage DC power supply for charging the conductor; an electric voltage regulator for adjusting the voltage according to the intensity of lightning; a power supply for providing power to the high-voltage DC power supply and the overvoltage protection trigger controller; and a spherical gap discharge and protection circuit for ensuring the overvoltage safety of the entire circuit. The lightning protection system of the present invention can effectively avoid damage to humans caused by lightning and ensure the safety of people's lives and property. In addition, the lightning protection system of the present invention has a simple structure, is easy to install, and has good social and economic benefits.

The invention discloses a lightning protection intelligent online monitoring system and method based on multi-source information fusion, and relates to the technical field of lightning protection. The system adopts a three-layer architecture of an equipment layer, a communication layer and an application layer. The equipment layer comprises a lightning early warning device, a lightning current monitoring device, an SPD intelligent monitoring device and a grounding performance monitoring device, and is used for comprehensively collecting data. And the communication layer realizes data protocol conversion and security encryption transmission through an intelligent gateway. And the application layer platform adopts a multi-source data fusion analysis model and a dynamic risk assessment algorithm to realize three-level lightning early warning and predictive maintenance of the health state of the lightning protection facility. The problems that traditional lightning protection monitoring is isolated, lagged and inaccurate are solved, omnibearing and intelligent online monitoring and active safety early warning of a lightning protection system are achieved, and the system is particularly suitable for complex industrial scenes with extremely high safety requirements.

The utility model discloses a detection equipment of building lightning protection device, include: protection box, its inside is provided with lifting assembly, equipotential tester main part, it is fixedly arranged in the protection box inside, and is connected with lifting assembly, and equipotential test is carried out to building lightning protection device, the drive source of lifting assembly is arranged as drive motor, drive motor is connected with two -way screw rod through sprocket chain transmission, the end portion threaded sleeve of two -way screw rod is connected with mobile connecting seat, the top of mobile connecting seat is provided with electric telescopic handle, and the telescopic end top of electric telescopic handle is provided with fixed connecting seat. The utility model discloses through the protection of electric connection plug -in cylinder to the protection, through the protection of plug, protects the connection plug, reduces the possibility that electric connection plug -in cylinder and connection plug are influenced by outside environment, reduces the possibility that dust in air attacks electric connection plug -in cylinder.

The invention provides a wind turbine comprising a lightning protection system for providing an electrically conductive path suitable for conducting lightning from the rotor to an electrical ground. The lightning protection system comprises a shroud electrically coupled to a wind turbine bearing housing and a front end of a wind turbine hub and / or main shaft. The shroud forms part of the electrically conductive path to electrically couple the wind turbine rotor to the bearing housing via a short circuit path that bypasses the bearing arrangement.

The utility model relates to the technical field of wind power blade lightning protection, in particular to a lightning protection assembly for wind power blade maintenance, which comprises a repairing sheet, the repairing sheet is arranged on the outer side of a blade shell, one end of the repairing sheet is connected with a blade tip lightning arrester, and one end, far away from the blade tip lightning arrester, of the repairing sheet is connected with a problem lightning arrester. The repairing piece is arranged on the outer surface of the blade shell, a lightning protection system does not need to be repaired by entering the blade shell, the problem that the lightning protection system fails due to the fact that a lightning conductor in the blade is narrow in fracture space and personnel cannot enter the blade for maintenance is solved, operation difficulty and risks are reduced, operation is relatively simple, and maintenance efficiency is high.

The invention discloses a connecting method for a photovoltaic lightning protection system and a support. The connecting method comprises the connecting process that a pipe clamp is constructed to clamp a steel pipe pile to serve as stress supporting stability of an inclined rod. The elastic arch spring piece and the middle plate on the inner side of the elastic arch spring piece are filled in the interval space h between the inner sides of the pipe clamp petals A and the pipe clamp petals B, so that the opposite tensioning stress of the bolt and nut fastening assembly on the pipe clamp petals A and the pipe clamp petals B is stable, the stress supporting stability of a steel pipe pile clamped by the pipe clamps as an inclined rod is guaranteed, and the problem that the interval space h exists between the pipe clamps is solved. And the stress supporting stability of the pipe clamp for clamping the steel pipe pile as an inclined rod is influenced.

The invention discloses a waterproof lightning-protection charging device for a new energy electric vehicle, and relates to the technical field of charging devices, the waterproof lightning-protection charging device comprises a charging pile, and further comprises a lightning-protection system connected with the charging pile; a cable is electrically connected between the charging gun and the interior of the charging pile, the middle of the cable is slidably sleeved with a rotating sleeve, a ball head of the rotating sleeve is connected with a sliding frame, and the sliding frame is slidably connected to a shell of the charging pile; and the waterproof folding cover is connected to the outer side of the charging gun. The waterproof folding cover is arranged, the conical folding cover and the circular folding cover are combined, the charging gun is tightly wrapped when not used, dust is prevented from entering the charging gun, and rainwater can be effectively prevented from permeating the charging gun when it rains; the folding cover can be magnetically attracted to the periphery of the charging port of the electric vehicle after being stretched, stability is enhanced, a gap between the conical folding cover and the shell of the electric vehicle is filled with a rubber ring made of water-absorbing expansion rubber, a waterproof sealing layer is formed, and the waterproof performance is further improved.

A method for providing a conductive connection point of a lightning protection system of a wind turbine blade to an expanded foil or mesh that may be configured as a down conductor extending from a tip connection block towards a root connection block, with a plurality of conductive connection points electrically connected therewith. One method embodiment includes melting a conductive material, applying the melted conductive material in a liquid state for surrounding the expanded foil or mesh, and allowing the melted conductive material to harden for providing a mechanical and electric conductive connection between the conductive connection point and the expanded foil or mesh. Another method embodiment includes providing at least two discs made of conductive material, arranging the discs on opposite sides of the expanded foil or mesh, and fastening the discs to each other with the expanded foil or mesh therebetween for providing an electric conductive connection.

The invention discloses a debris flow monitoring and protecting device based on a high-frequency radar, and relates to the technical field of debris flow monitoring based on the high-frequency radar. The adjusting unit comprises a supporting rod, a hoop clamp, a connecting arm, a holder support and a storage module. The lightning protection unit comprises an insulation assembly, a conductive disc, an installation assembly and a lightning guiding assembly. According to the device, structural follow-up shielding is formed under the arrangement of the lightning protection unit and the adjusting unit. The cage-shaped skeleton structure of the lightning rod can move synchronously along with the movement of the radar, so that the lightning rod is ensured to be the highest point in any working posture, continuous and all-around dynamic lightning protection is provided for the high-frequency radar, and the problem of direct lightning protection of movable equipment is solved fundamentally. The lightning protection system not only provides a direct lightning discharge main channel, but also provides a preset discharge path for electric charges induced by the radar shell through the current-conducting plate, so that an internal circuit is prevented from being damaged.

The invention relates to a variable-pitch blade assembly (1) for an open-rotor turbine engine of an aircraft, the assembly comprising: a rotor (3) which is movable relative to a radial axis (X) of the turbine engine; a stator (4) which is stationary relative to the radial axis (X); and at least one lightning protection system (5). The lightning protection system (5) comprises: a pin (6), at least one face of the pin (6) being in frictional contact with the rotor (3); a screw (7) which radially extends the pin (6); and a means (8) for connecting the pin (6) and the screw (7), the connecting means (8) comprising a spring inserted between the pin (6) and the screw (7).

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.