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Publications associées (30)

Prony Series Representation for the Lightning Channel Base Current

Farhad Rachidi-Haeri

In this paper, a new representation for the lightning channel base current is proposed in terms of the so-called Prony series, obtained by means of a modified time-domain variant of the well-known vector fitting technique. This method allows both to reprod ...

2012

Lightning electromagnetic radiation over a stratified conducting ground: Formulation and numerical evaluation of the electromagnetic fields

Farhad Rachidi-Haeri, Abdolhamid Shoory

The formulation describing the electromagnetic field radiated by a lightning return stroke over a two-layered conducting ground is presented in this paper. The derivation of the Green's functions required to solve the problem is first discussed in detail, ...

American Geophysical Union2011

Electromagnetic Environment Associated with Lightning Strikes to Tall Strike Objects

Seyed Abbas Mosaddeghi

The study of the lightning interaction with tall strike objects has attracted considerable attention of lightning researchers lately. Many lightning measurements including current and associated electromagnetic fields were recently made all over the globe ...

EPFL2011

On the Current Peak Estimates Provided by Lightning Detection Networks for Lightning Return Strokes to Tall Towers

Farhad Rachidi-Haeri, Marcos Rubinstein, Davide Pavanello

The peak current estimation of lightning detection networks for strikes to tall towers is discussed in this paper. Such systems are sometimes calibrated using return-stroke current data obtained by means of rocket-triggered lightning or instrumented towers ...

2009

Analytical Expressions for Zero-Crossing Times in Lightning Return-Stroke Engineering Models

Farhad Rachidi-Haeri, Marcos Rubinstein, Abdolhamid Shoory

One of the characteristic features of the electromagnetic fields radiated by lightning is the far-field inversion of polarity with a zero-crossing occurring in the tens of microseconds range. This feature has been used in several studies to test the abilit ...

2009

The influence of frequency dependent soil electrical parameters on the evaluation of lightning electromagnetic fields in air and underground

Farhad Rachidi-Haeri

This paper is aimed at analyzing the influence of the frequency-dependent behavior of the ground electrical parameters ( conductivity and ground permittivity) on the electromagnetic field radiated by a cloud-to-ground lightning return stroke. Both radiatio ...

2009

On the Relationship Between the Signature of Close Electric Field and the Equivalent Corona Current in Lightning Return Stroke Models

Farhad Rachidi-Haeri, Carlo Alberto Nucci

Engineering return stroke models can be categorized either as current generation (traveling current source type) models or current propagation (transmission line type) models. The current generation models are described among other parameters by a corona c ...

Institute of Electrical and Electronics Engineers2008

Electromagnetic radiation from lightning return strokes to tall structures

Davide Pavanello

The study of the interaction of lightning electromagnetic fields with electrical systems and the design of appropriate protection strategies are generally based on statistical distributions of the lightning current measured at the channel base using either ...

EPFL2007

Determination of Lightning Currents from Far Electromagnetic Fields: Effect of a Strike Object

Mario Paolone, Farhad Rachidi-Haeri, Marcos Rubinstein, Davide Pavanello, José-Luis Bermudez

We discuss in this paper the influence of the presence of an elevated strike object on the peak of the lightning return stroke current determined from remote field measurements. We develop analytical expressions relating the lightning return stroke channel ...

2007

Lightning strikes to elevated structures: influence grounding conditions on currents and electromagnetic fields

Farhad Rachidi-Haeri, Marcos Rubinstein, Davide Pavanello, Emanuel Petrache

This paper presents an analysis of lightning return strokes to tall structures. The interaction of lightning with a tall structure is modeled using the antenna theory. The finite ground conductivity as well as the buried grounding system of the tall struct ...

2005

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