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Paper Information

Journal:   INTERNATIONAL JOURNAL OF ENERGY AND ENVIRONMENTAL ENGINEERING   2016 , Volume 7 , Number 2; Page(s) 235 To 247.
 
Paper: 

TRANSIENT BEHAVIOR OF WIND TOWERS GROUNDING SYSTEMS UNDER LIGHTNING STRIKES

 
 
Author(s):  ARANEO RODOLFO*, CELOZZI SALVATORE
 
* DIAEE–ELECTRICAL ENGINEERING DIVISION, ‘‘SAPIENZA’’ UNIVERSITY OF ROME, VIA EUDOSSIANA 18, 00184 ROME, ITALY
 
Abstract: 

Wind turbines, because of their height and localization, are frequently subject to direct lightning strikes. Thus, the investigation on the performance of their grounding system is of paramount interest for the prediction of the potential threats either for people working in (or animals passing through) the wind farm area and for the power and control units installed in close proximity of the turbine towers. In this paper, we perform a comprensive study of the transient behavior of the earthing systems of wind turbines. The analysis is conducted in the frequency domain and an hybrid approach, based on circuit theory and Method of Moments, is adopted to fully account for resistive, inductive and capacitive couplings between elements of the ground system. The actual transient behavior is obtained by means of an Inverse Fourier Transform. The results, computed considering a typical wind turbine grounding system configuration, provide more insight on the nature of the early-time transient response of grounding systems and allow to draw up useful design guidelines.

 
Keyword(s): LIGHTNING, WIND TURBINES, GROUND SYSTEMS
 
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