1 INTRODUCTION Electric power utilities have sustained significant damage from lightning. The occurrence of line faults is one result of lightning damage. To prevent it, power utilities adopt various measures of protection from lightning. Transmission line overhead ground wires greatly contribute to a decrease in the number of line faults by preventing direct hits to the power lines. Lightning ...

Lightning mapping technology has proven instrumental in understanding lightning. In this work we present a pipeline that can use lightning observed by the LOw-Frequency ARray (LOFAR) radio telescope to construct a 3D map of the flash. We show that LOFAR has unparalleled precision, on the order of meters, even for lightning flashes that are over 20 km outside the area enclosed by LOFAR antennas ...

E-mail: [email protected] T his paper deals with the direct effects of lightning strike on aircraft structures. In a first part, the phenomenology of lightning arc attachment on aircraft is introduced. Some specific features of lightning arcs observed in flight or created in the laboratory are presented. Some recent developments and results from numerical simulations are shown. The sha...

A lightning return-stroke model, based on the lightning return-stroke current derivative measured at the Toronto CN Tower is presented in this paper. A 3-section transmission line representation of the CN Tower along with the derivative of the modified Heidler function is used to simulate the measured current derivative signal. Reflections from major structural discontinuities of the CN Tower a...

Simulation of weather scenery in computer graphics (CG) is an important issue that has a wide range of applications related to image content, such as in movies and in various landscape simulations. In general, research to date into CG lightning has focused on generating a lightning pattern by applying probability and statistics techniques, which do not consider the generating mechanism of light...

[1] Very low frequency (VLF) electromagnetic pulses radiated by lightning are an effective tool for probing the D region ionosphere. We detect and measure the D region ionospheric disturbances caused by the strong lightning flash by analyzing the broadband VLF spectrum from lightning that occurred just before and after a nearby intense lightningdischarge.Comparing themeasured electrondensity ch...

The scientific literature is voluminous with respect to the cloud-to-ground (CG) lightning and electrical characteristics of mesoscale convective systems (MCSs). MacGorman and Morgenstern (1998) define an MCS as a long-lived storm system that amalgamates from a group of smaller storms through interactions with the local environment. One of the more common types of MCS is the squall line, which ...

Electromagnetic models based on antenna theory have been recently applied in lightning studies. Their practical use is facilitated by existing thin-wire antenna numerical codes that utilize localized voltage sources. Such voltage sources have to be tuned to provide the lightning channel-base current for which experimental data are available. This involves some preparatory steps, such as the det...

Lightning strikes to overhead transmission lines cause travelling waves which propagate along the overhead line and enter substations where they cause overvoltages which can pose a risk to any items of equipment connected, such as cables or transformers. With the use of metal-oxide arresters, these overvoltages are reduced to values which, taking into account an adequate safety margin, are belo...

All lightning processes, in both cloud and cloud-toground discharges, are associated with the motion of charges an& as a result, produce electromagnetic fields. Only one (presumably the most important from an EMC point of view) process, the return stroke in cloud-toground lightn& is considered in this review. There are basically four levels of sophistication in the mathematical modeling of the ...