UniTTe

On 23^rd November 2017, Alexander R.M. Forsting successfully completed his doctoral degree by defending his PhD thesis. Congrats Alex!

Download the slides of the defence here. The final version of the PhD thesis will soon be publicly available on DTU Orbit.

The project results up to date and experience and expectations from wind energy industry regarding the use of nacelle lidars for turbine performance assessment were presented and discussed in a dedicated 1 day workshop on the 15th of November 2016 with 39 participants.

Links to the workshop presentations and pictures

The audience has selected his presentation "V infinity is found" about the concept of free stream wind speed estimation from nacelle lidars measurements within the induction zone.

See the slides: "Near flow measurements with nacelle lidars: the future of power performance"

CFD simulations of the inflow to a row of wind turbines have shown that the power production of the turbines deviate significantly compared to a corresponding isolated turbine even though there is no direct wake turbine interaction.

   
Find the link to the paper here

A 2.3MW Siemens turbine has been instrumented with two profiling nacelle lidars – ZDM and 5-beam Avent lidars. Power and full loads sensors have also been installed. The measurement campaign started at the end of May 2015 and will last 6 months. The wind farm is located in Nørrekær Enge in the North of Jutland, DK.
Read more or see more pictures

The two profiling nacelle lidars of UniTTe being calibrated in Høvsøre, DK. Avent 5-beam Demonstrator is on the left – ZephIR Dual-Mode lidar is on the right.

See more pictures - or get more information

UniTTe will deliver new Measurement procedures - describing how modern nacelle-mounted lidars should be calibrated and how to use them for load and power Measurements. These new procedures will be scrutinised by a range of participating organisations - developers, manufacturers and standards bodies. Ultimately we anticipate that UniTTe will deliver the scientific basis for the next generation of international power and load standards.