Different types of tall structures are severely exposed to lightning discharges, including power lines, communicationtowers, buildings and wind turbines all over the world. Thepresent paper focuses on the numerical modelling and simulationof the effect of wind on the electric field developed over agrounded object under thunderstorm conditions. The electric fieldcreated by the charge distribution in the thundercloud above theobject, which is in first place enhanced by its geometry, leadsto the generation and secondly upward propagation of chargefrom the object. Recent investigations underline that the effectof the removal of the corona space charge by the wind leadsto a higher field strength at the grounded object and, therefore,it becomes easier for it to initiate an upward connecting leadercompared to a situation where the space charge is present. Inthis work, a simplified space charge drift model quantifies thedifference between static towers and rotating wind turbines whichare influenced by different resultant wind velocities. The voltagedistribution and ion drift velocities in the vicinity of the groundedstructures are illustrated. The results show a higher voltagegradient at the side of the object facing the wind, leading toa higher probability of lightning attachment.
|Title of host publication||Proceedings of 2015 International Conference on Lightning and Static Electricity|
|Number of pages||8|
|Publication status||Published - 2015|
|Event||2015 International Conference on Lightning and Static Electricity - Toulouse, France|
Duration: 9 Sep 2015 → 11 Sep 2015
|Conference||2015 International Conference on Lightning and Static Electricity|
|Period||09/09/2015 → 11/09/2015|