Rotor Condition Monitoring for Improved Operational Safety of Offshore Wind Energy Converters

[+] Author and Article Information
Peter Caselitz, Jochen Giebhardt

Institute for Solar Energy Supply Technology (ISET), Division of Energy Conversion and Control Engineering, Königstor 59, D-34119 Kassel, Germanye-mail: dce@iset.uni-kassel.de

J. Sol. Energy Eng 127(2), 253-261 (Apr 25, 2005) (9 pages) doi:10.1115/1.1850485 History: Received May 21, 2004; Revised September 27, 2004; Online April 25, 2005
Copyright © 2005 by ASME
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Simplified model of rotor mass imbalance
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Relation of thrust and angle of attack for a blade profile
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Sensor configuration for measurement of nacelle oscillations
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Power characteristic of a 600 kW wind energy converter with absolute and calculated alarm limits
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Monitoring of complex spectral components with a circle shaped alarm limit
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(a) Five subsequent time series (900 s each) of electrical power output, (b) the respective 1p amplitudes of the transverse tower oscillation, and (c) the respective 1p amplitudes of the torsion tower bending moment
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Acceleration signal spectra of a 600 kW wind energy converter with constant speed
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Complex spectral components of nacelle oscillation at 1p frequency
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1p transverse oscillation amplitudes versus active power output of a 1000 kW wind energy converter
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1p axial oscillation amplitudes versus active power output of a 1000 kW wind energy converter




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