Parking Strategies for Vertical Axis Wind Turbines. (24th October 2012)

• Record Type: Journal Article
• Authors: Ottermo, F.; Eriksson, S.; Bernhoff, H.
• Other Names: Kalligeros S. S. Academic Editor.; Li S. Academic Editor.; Lund P. Academic Editor.
• Is Part Of: ISRN renewable energy. Volume 2012(2012)
• Publication Date: 2012-10-24
• Subjects: Renewable energy sources -- Periodicals; Renewable energy sources; Periodicals; Electronic journals; 621.042
• DOI: 10.5402/2012/904269
• Languages: English
• ISSNs: 2090-7451

Abstract

Abstract : Strategies for parking a vertical axis wind turbine at storm load are considered. It is proposed that if a directly driven permanent magnet synchronous generator is used, an elegant choice is to short-circuit the generator at storm, since this makes the turbine efficiently damped. Nondamped braking is found to be especially problematic for the case of two blades where torsional oscillations may imply thrust force oscillations within a range of frequencies.