The Danish-Swiss wind energy optimiser ROMO Wind installed its patented wind measurement technology iSpin, which measures wind directly at the spinner, in 16 Nordtank NTK 1500/64/80 turbines in the Sustrum/Renkenberge wind farm (Germany). The results of the measurements: the yaw misalignments in the turbines were between 11.8 and 21.7 degrees. After this had been rectified, yield increased by 7.7 percent on average.
In the spring of 2013, the operators of the wind farm, BVT Windpark Sustrum/Renkenberge GmbH & Co. KG, had the iSpin System installed in three turbines on a trial basis. Measurements showed yaw misalignments of between 9.3 and 12.5 degrees. After the yaw misalignments were corrected, the yield from the turbines was on average 3.7 percent higher.
The system was consequently extended to a further 16 turbines in the wind farm. When carrying out the measurements – between autumn 2014 and summer 2015 – ROMO Wind also found significant yaw misalignments of between 11.8 and 21.7 degrees. The result after rectifying the yaw misalignment: an average of 7.7% increase in yield.
