9 results about "Direct lightning strike" patented technology

The invention provides a vehicle-mounted mobile lightning test system which comprises a vehicle-mounted chassis, a hydraulic lifting and overturning platform and an impulse voltage generator, the hydraulic lifting and overturning platform is arranged on the vehicle-mounted chassis, and the impulse voltage generator is arranged on the hydraulic lifting and overturning platform. And the impulse voltage generator can overturn under the action of the hydraulic lifting and overturning platform. According to the vehicle-mounted mobile thunder and lightning test system provided by the invention, through the design of the hydraulic lifting and overturning platform, the impulse voltage generator can be adjusted to be in a horizontal posture during transportation, so that the transportation height and the gravity center are reduced, and the road transportation requirements are met; in a test site, the impulse voltage generator can be overturned to a vertical posture, the height and space requirements required by the test are met, and the requirements of direct lightning stroke effect test and airworthiness conformity verification of large tested objects such as low-altitude aircrafts and wind power blades in a non-fixed laboratory environment can be met.

Power line conductors are normally shielded from direct lightning strikes by appropriately placed overhead ground wires. However, even when such overhead ground wires work as intended and intercept a strike, for a short period of time, typically a few microseconds, the shield wire is exposed to an impulse type potential rise. This could be sufficient to cause flashover of one or more line insulator strings. This is called backflash. The present invention solves this problem by providing a power transmission tower structure with an embedded ground conductor positioned in order to optimize the coupling factors to all conductors and reduce stress on all insulator strings through increased electromagnetic coupling. Use of a streamer-inhibited conductor avoids adverse effects such as radio interference and audible noise due to induced charges and improves electromagnetic coupling as a result of the reduced surge impedance of the conductor.

The invention discloses an aircraft gravity filler cap with electric lap joint and lightning protection functions, and belongs to the technical field of aircraft gravity refueling. The aircraft gravity filler cap with the electric lap joint and lightning protection functions comprises a filler cap seat, an upper cover assembly and a lower cover; the upper cover assembly is provided with a conductive piece making contact with the covering cap base. The lower cover is made of a high dielectric strength material; the metal base and the covering cap seat are in electric lap joint through the conductive part, when the whole aircraft gravity filler cap is struck by lightning, the conductive part conducts electric charges to the covering cap seat and the outer wall of an oil tank, and therefore the sealing face of the covering cap seat is prevented from being ablated by high-voltage electric arcs when the aircraft gravity filler cap is struck by lightning, and personnel and equipment are prevented from being damaged by residual electric charges. The lower cover is located in the oil tank and is made of high dielectric strength materials, electric fire is prevented from occurring in the oil tank of the gravity oil filler cover under the direct thunder and lightning action, and the problems that a traditional gravity oil filler cover does not have good electric lap joint performance, and a sealing face of a cover seat is ablated by high-voltage arcs when the traditional gravity oil filler cover is subjected to the thunder and lightning are solved.

This utility model provides a lightning protection filter circuit suitable for airborne windshield washer systems, relating to the field of power adapter technology. It includes a lightning protection filter device, within which a lightning protection filter circuit is installed. The lightning protection filter circuit comprises a conventional lightning protection filter circuit, a power supply characteristic protection circuit, and a power supply filter protection circuit. These circuits are connected sequentially. An AC input terminal, a signal output terminal, and a power output terminal are respectively arranged around the lightning protection filter device. By integrating the conventional lightning protection filter circuit, the power supply characteristic protection circuit, and the power supply filter protection circuit into a single space, it not only meets the filtering efficiency against high-frequency external interference but also provides protection against indirect and direct lightning strikes, thus satisfying the electromagnetic compatibility requirements of complex electromagnetic environments in aircraft. It can be widely used in the field of complex electromagnetic environments in aviation.

The utility model discloses a multi-gap lightning protection device which comprises an insulating rod, two ends of the insulating rod are respectively connected with an upper connecting fitting and a lower connecting fitting, an insulating disc is coaxially arranged on the insulating rod, and the multi-gap lightning protection device is characterized in that two sides of the insulating disc are respectively provided with a vertical electrode column, and the two electrode columns are close to the edge of the insulating disc. The central angle between the two is greater than 20 degrees; a plurality of electrode balls are embedded in the insulating disc, the electrode balls are uniformly distributed at intervals along a major arc between the two electrode columns, a gap hole perpendicular to a connecting line between any electrode ball and the adjacent electrode column or between the electrode ball and the adjacent electrode column is formed, and one end of the gap hole penetrates through the surface of the insulating disc; the upper connecting fitting and the lower connecting fitting are respectively provided with an electrode column facing the insulating disc. Every two adjacent electrode columns are arranged in a spaced mode. The lightning arrester has the advantages of being simple in structure, convenient to install, capable of being operated and used in a severe environment, low in maintenance cost, large in through-flow capacity, capable of bearing direct lightning attack and the like.

This invention relates to the field of power system technology, and provides a method, device, electronic device, and storage medium for locating lightning strike faults in transmission lines. The method includes: acquiring transient voltage data after a direct lightning strike on a transmission line; defining a set of possible fault locations based on historical fault data; converting the transient voltage into a transient current; injecting the transient current in reverse from the same observation point into a simulation model of the transmission system to simulate the transverse branch current at each possible fault location; calculating the time-domain similarity between the transient current and the transverse branch current at each possible fault location, and determining the fault location with the highest similarity as the lightning strike fault location. This application only requires the installation of a single measurement point at the main substation to achieve high-precision lightning strike fault location with high reliability. It is applicable not only to lossless systems but also to lossy transmission lines.

A thunder and lightning intercepting apparatus. In the present application, a sufficiently long target upward leader can be generated, so as to construct a thunder and lightning discharge channel; and several lightning rods are used to receive overhead lightning strikes and side lightning strikes that are from different directions, so as to intercept the overhead lightning strikes and side lightning strikes, thereby effectively attenuating lightning strike currents and reducing the intensity of a lightning-strike electromagnetic field. Therefore, the present application may be applicable to buildings that need protection against direct lightning strikes and induction lightning strikes, and is particularly applicable for use in systems such as onshore / offshore wind power, high-voltage power transmission, or high-speed rail overhead lines, thus playing a role in effectively intercepting lightning strikes from different directions. Not only is the safety of buildings to be protected improved, but the usage cost is also saved on.

This invention discloses a method for calculating the direct lightning trip rate of a power collection line affected by a wind turbine, belonging to the field of lightning protection for wind farm power collection lines. The calculation method first obtains relevant parameters of the wind farm power collection line and the geographical location of the wind turbine. Then, it divides the line segment and lightning current amplitude range, comparing the line backflashover withstand level and the backflashover current range with the lightning current amplitude to calculate the line backflashover trip rate and backflashover trip rate. The direct lightning trip rate is corrected based on the overlap area between the wind turbine lightning interception area and the line direct lightning strike area. Finally, the method iteratively calculates different lightning current amplitudes and line segments and accumulates the results to obtain the line direct lightning trip rate. This invention considers the influence of the wind turbine on the line lightning strike probability when calculating the direct lightning trip rate of the power collection line, making the calculation results of the direct lightning trip rate of the wind farm power collection line more accurate.

A drone with a Faraday cage includes a lattice-shaped conductor configured to expose the propellers to the outside and surround the drone body (control unit), a lightning rod disposed on the conductor and configured to avoid a direct lightning stroke on the propellers, an insulating attachment portion configured to attach the conductor to the drone, and a guide line configured to connect the conductor and the control facility on the ground.