S.4.4 Lightning measurements on radio-communication towers

13/03/2014
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S.4.4 Lightning measurements on radio-communication towers

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Lightning measurements on radio-communication towers Sylvain Person dept. name of organization Orange Lannion, France sylvain.person@orange.fr Ahmed Zeddam dept. name of organization Orange Lannion, France ahmed.zeddam@orange.fr François Malaterre Technical department Météorage Pau, France francois.malaterre@meteorage.fr Stéphane Pédeboy Head of Technical department Météorage Pau, France stephane.pedeboy@meteorage.fr Abstract— Orange and Meteorage have unified their skills to set up an experiment related to the lightning storms. It consists in measuring the current values when direct strokes hit the air termination system on two radio telecommunication towers and in addition to check the way it is distributed within the structure. For Orange the results will be precious to contribute to the ITU- T Standardization in order to optimize the engineering rules for the radio communication towers electromagnetic protection. For Meteorage the interest is to strengthen and validate the algorithms of the stormy activity geo-localization, knowing that for a given lightning stroke Orange has this information. The two experimental sites are located in the Rhône-Durance (France) area. Each one is equipped with a field mill to register the electrostatic field in an area of 15km around the site, 24h a day, and with a digital oscilloscope to which are connected four current transformers dedicated to the direct lightning stroke current, to the current flowing through the surge arrestors, to the electric line and to the grounding system. The control of both instrumentations is performed through the 3G network. The paper focuses on the main objectives of this experiment, the difficulties encountered for the installation of the measuring equipment and the solution which have been implemented to fix them. Then the outcomes of the experiment will be discussed with regard to the ongoing work in standardization. Keywords—Lightning current; Lightning Locating System (LLS); Radio-telecommunication towers; standardization; I. INTRODUCTION (Heading 1) This template, modified in MS Word 2007 and saved as a “Word 97-2003 Document” for the PC, provides authors with most of the formatting specifications needed for preparing electronic versions of their papers. All standard paper components have been specified for three reasons: (1) ease of use when formatting individual papers, (2) automatic compliance to electronic requirements that facilitate the concurrent or later production of electronic products, and (3) conformity of style throughout a conference proceedings. Margins, column widths, line spacing, and type styles are built- in; examples of the type styles are provided throughout this document and are identified in italic type, within parentheses, following the example. 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