Extreme variance vs. turbulence: What can the IEC cover?

Description

Here we demonstrate the effect of extreme variance events on wind turbine loads. From ten years of data, we analyze periods with variance exceeding the IEC extreme turbulence prescription.
The variance is mainly due to coherent gust-like events, and not turbulence, and these events additionally incur extreme shear. Loads from simulations of these events are compared with the extreme turbulence design load case of the IEC standard, with the latter generally giving higher loads.

Period	2 Oct 2017
Event title	Wind Energy Denmark 2017
Event type	Conference
Location	Herning, DenmarkShow on map