Method for early identification of material fatigue in wind turbine installations
AssigneeØrsted Wind Power A/S
InventorsMathias Bækdal MADSEN, Stjepan MAHULJA, Andreas Søndergaard PEDERSEN
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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.
Claims12
A method for the early identification of material fatigue in drive train components of a wind turbine installation, the method comprising:—
- determining rotational data of a drive train component for complete rotations thereof;
- extracting amplitude values from the rotational data based on twice the frequency of rotation;
- monitoring the extracted amplitude values over time;
- triggering an alert response when a change in a characteristic of the amplitude values is determined.
Dependencies are inferred from the claim text.