Assessing the Performance of Turbine Rotor Ice Detector Systems

Wind Power
Period of realization: April 1, 2017 to May 1, 2019

Nergica compared the performance of three rotor-mounted ice detectors, namely Weidmüller’s BLADEcontrol, fos4X’s Rotor Ice Control and Eologix. The performance of these rotor-mounted detectors installed on a Nergica-owned wind turbine was evaluated in terms of technical availability, total duration of measured icing throughout the period, severity and temporal accuracy.

Images taken every 10 minutes by two hub-mounted cameras as well as the turbine’s status codes were used as references.


  • Over the course of the winter of 2017-2018, the cameras installed on one of the 2 MW Senvion wind turbines at Nergica’s research site observed an average of 1,023 hours of instrumental icing.
  • Each of the detection methods used showed adequate levels of technical availability, which ranged between 89 % and 99%.
  • The detection systems were all evaluated as a function of the Hanssen-Kuipers Skill Score (KSS), an index that represents the system’s ability to detect icing when it is actually present. The KSS values obtained range from 10% to 75%.