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Detecting Faults in Wind Turbines

United States Patent Application

20130325373
A1
View the Complete Application at the US Patent & Trademark Office
A wind turbine generator fault detection method is described. The method includes acquiring current data from a wind turbine generator during operation, determining frequency demodulated signals and amplitude demodulated signals by frequency demodulating and amplitude demodulating the current data, resampling the frequency and amplitude demodulated signals corresponding to the current data, monitoring a frequency spectra of the resampled frequency and amplitude demodulated signals corresponding to the current data to identify one or more excitations in the frequency spectra. In response to identifying one or more excitations in the frequency spectra at one or more of the variable fault characteristic frequencies, the method includes generating and transmitting an alert that indicates that a wind turbine generator fault is detected.
Qiao, Wei (Lincoln, NE), Gong, Xiang (Lincoln, NE)
13/ 904,469
May 29, 2013
FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] This invention was made with government support under Grant No. DE-EE0001366 awarded by Department of Energy. The government has certain rights in the invention.