202 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 present invention relates to a wind turbine blade having a lightning protection system. The blade includes a pressure side shell part and a suction side shell part. The pressure side shell part or the suction side shell part comprises a blade component extending along a longitudinal axis of the blade and comprising one or more carbon fibre structures. The blade component is at least partially embedded in the shell part. An elongate metallic element is arranged in direct contact with the blade component, and at least part of the elongate metallic element is positioned between the blade component and an outer surface of the shell part. A lightning receptor is arranged in electrical contact with the elongate metallic element and extends to or near an outer surface of the blade shell part. The lightning receptor does not extend through the blade component.

An anchor for components of a lightning protection system may rely on a bonding agent, such as an adhesive, needing time for curing, drying, or otherwise setting (increasing in adhesion, strength, mechanical stability, or any combination thereof) by remaining in place while setting. The anchor may be suspended by a lip extending horizontally past an edge (plane of intersection of two planar surfaces) where a base plate is adhered to a vertical surface and the lip rests, registers in translation, and squares in rotation against a horizontal surface sharing an edge or fold (corner, bend) with the vertical surface. Once set sufficiently, the adhesive supports loads in shear (along plane of adhesion) and tension (perpendicular to plane of adhesion) imposed by brackets holding a cable, point, or both at each base plate.

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.

A lightning protection system (100) for a wind turbine blade, a wind turbine blade, a wind power generation device, and a blade tip lightning receptor (10), which can improve the current carrying efficiency of conductors and reduce the consumption of conductor materials. The lightning protection system (100) is used for a blade, and the lightning protection system (100) comprises: a blade tip lightning receptor (10) comprising a first conductor portion (11) and a second conductor portion (12) which are distributed in a first direction, wherein the second conductor portion (12) is connected to the first conductor portion (11), the blade tip lightning receptor (10) can be connected to the blade tip of the blade, and at least part of the first conductor portion (11) protrudes from the blade tip; and a first lead (20) having one end electrically connected to the second conductor portion (12) and the other end extending towards a side where the blade root of the blade is located. At least one of the first conductor portion (11) and the first lead (20) is internally hollow, thereby improving the current carrying efficiency of conductor materials in the first conductor portion (11) and / or the first lead (20) in the lightning protection system (100), and reducing the consumption of the conductor materials in the lightning protection system (100).

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 invention provides a fan lightning protection system detection device and method.The fan lightning protection system detection device comprises a cantilever detection assembly arranged on a fan tower drum, the height position of the cantilever detection assembly is the position where the front end of a fan blade rotates to be close to the bottom of the fan tower drum, and a conductive assembly is arranged at the front end of the cantilever detection assembly; and the conductive assembly is used for contacting a metal piece at the front end of the fan blade and is connected with the detection unit, and the conduction state of the lightning protection system is detected through the detection unit. According to the device, the conductive assembly is in contact with the metal piece, and the conduction state between the conductive assembly and the metal piece is detected through the detection unit, so that the conduction state of the fan lightning protection system is judged. And a soft magnet contact mode is adopted, so that fan blades are prevented from being abraded. According to the method, automatic detection of the lightning protection system is realized, shutdown detection of the fan is not needed, detection personnel do not need to climb on the fan tower tube to carry out high-altitude operation, the workload and risk of the detection personnel are reduced, and the continuous reliability of the lightning protection system is further ensured.

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 relates to the technical field of wind power generation, in particular to a wind power blade with a lightning protection system. The blade comprises a blade body, the blade body is composed of a root and a shell, a metal net interlayer is arranged in the inner wall of the shell, a notch is formed in the end, away from the root, of the blade body, a lightning arrester is arranged in the notch, the lightning arrester and the metal net interlayer are connected through two connecting structures, and the two connecting structures are arranged in a central symmetry mode. And a sealing structure is arranged above the two connecting structures in a sliding manner. The lightning arrester is installed in the notch in the end, away from the root, of the blade body so that lightning current can be guided during lightning stroke, the lightning arrester can slide in the notch so that installation, disassembly and maintenance can be facilitated, the lower lock shell is fixedly connected with the blade body, the upper lock shell is arranged on the side, away from the root, of the lower lock shell, and the upper lock shell is fixedly connected with the lightning arrester. Through mutual insertion of the lower lock shell and the upper lock shell, quick connection of the lightning arrester and the blade main body is realized.

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.

The invention belongs to the technical field of wind power blade lightning protection, and discloses a lightning protection system fault diagnosis method, which is characterized in that a data sound card collector is arranged at the root of a blade and is used for collecting sound signals in a blade cavity, converting the collected sound signals into digital signals, and sending the digital signals to a server; the fault monitoring, fault early warning and diagnosis module monitors the lightning protection system in real time by using the digital signal through a deep learning fault diagnosis algorithm; meanwhile, a current loop is arranged at the blade root and used for collecting lightning current, the state of a down lead of the lightning protection system in the service period of the blade is judged by assisting a fault monitoring, early warning and diagnosis module by comparing the lightning current with existing actual lightning current data, and finally the real-time state of the lightning protection system is responded to through an upper computer. The fault monitoring, early warning and diagnosis system can monitor the state of the lightning protection system in the service period in real time, can repair or replace the down lead fractured due to mechanical stress generated by deformation in time, improves the reliability of the lightning protection system, and reduces the risk of lightning protection failure.

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.