A METHOD FOR EARLY IDENTIFICATION OF MATERIAL FATIGUE IN WIND TURBINE INSTALLATIONS

Abstract: a method is described for the early identification of material fatigue in drive train components of a wind turbine installation. in particular, a signal, representing revolutions per minute of a wind turbine shaft, is obtained and modulated by the azimuth angle measurement of the turbine blade. this signal is band passed at twice the frequency of rotation and fourier transformed to extract amplitude values. an alert response can then be triggered when it is determined that there has been a change in a characteristic of the amplitude values such as the amplitude values increasing beyond a multiple of a determined baseline amplitude value.

Inventor(s): Mathias Bækdal MADSEN, Stjepan MAHULJA, Andreas Søndergaard PEDERSEN

CPC Classification: F03D17/011 ({for monitoring mechanical loads or assessing fatigue; for monitoring structural integrity})

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