4 results about "Direct lightning strike" patented technology

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.

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.