Aeroelastic stability of wind turbines: the problem, the methods and the issues

Aeroelastic stability is a key issue in the design process of wind turbines towards both enchanced stability and increased fatigue life. The theory and models behind the state-of-the-art aeroelastic stability tools developed for the analysis of the complete wind turbine at the Centre for Renewable Energy Sources and the National Technical University of Athens are presented in this article. Application examples of stability calculations for a pitch, variable speed and a stall-regulated wind turbine ore also presented. Copyright (C) 2004 John Wiley Sons, Ltd.