Articles | Volume 6, issue 5
Wind Energ. Sci., 6, 1079–1087, 2021
Wind Energ. Sci., 6, 1079–1087, 2021

Research article 02 Sep 2021

Research article | 02 Sep 2021

Effect of individual blade pitch angle misalignment on the remaining useful life of wind turbines

Matthias Saathoff et al.

Related authors

Assessment of a rotor blade extension retrofit as a supplement to the lifetime extension of wind turbines
Malo Rosemeier and Matthias Saathoff
Wind Energ. Sci., 5, 897–909,,, 2020
Short summary
Benefits of subcomponent over full-scale blade testing elaborated on a trailing-edge bond line design validation
Malo Rosemeier, Gregor Basters, and Alexandros Antoniou
Wind Energ. Sci., 3, 163–172,,, 2018
Short summary

Related subject area

Operation, condition monitoring, and maintenance
On sensor optimisation for structural health monitoring robust to environmental variations
Tingna Wang, David J. Wagg, Keith Worden, and Robert J. Barthorpe
Wind Energ. Sci. Discuss.,,, 2021
Revised manuscript accepted for WES
Short summary

Cited articles

ABH: Prüfbericht zur Typenprüfung in statischer Hinsicht, Amt für Bauordnung und Hochbau, Prüfstelle für Baustatik, Hamburg, Germany, 1999. a
Astolfi, D.: A study of the impact of pitch misalignment on wind turbine performance, Machines, 7, 8,, 2019. a
Bertelè, M., Bottasso, C. L., and Cacciola, S.: Automatic detection and correction of pitch misalignment in wind turbine rotors, Wind Energ. Sci., 3, 791–803,, 2018. a
Cacciola, S., Agud, I. M., and Bottasso, C. L.: Detection of rotor imbalance, including root cause, severity and location, J. Phys.: Conf. Ser., 753, 072003,, 2016. a, b
CEN: Eurocode 1: Actions on structures – Part 1–4: General actions – Wind actions; EN 1991-1-4:2005 + A1:2010 + AC:2010, European Committee for Standardization, 2009. a
Short summary
Wind turbine blade misalignments were measured. About 38 % of the turbines measured have been operating outside the accepted misalignment range. This research quantifies the effect of the measured misalignment on the turbine lifetime by means of simulations. The lifetimes of the main frame at the tower top and the tower base were affected most by a blade misalignment. To avoid a lifetime reduction, blade misalignments should be identified and corrected as early as possible during the lifetime.