Fault diagnosis of hydro-generator unit vibration based on wavelet packet analysis
Li Guo · 2002
A fault diagnosis mothed for hydro_generator units has been put forward according to their vibration frequency spectrum characteristics. The abrupt change informatiom can be obtained through decomposing and reconstruction of the vibrating signal by wavelet packet; therefore the fault condition of the hydro_generator unit can confirm and provide decision support for diagnosing the vibration fault of the unit. The theoretic calculation shows the analysis mothed of wavelet packet not only can confirm the abrupt change point of the signal, but alse can confirm the fault degree and time in all frequency spectrum. The computer simulation shows this mothed is very effective to the fault diagnosis of vibration of hydro_generator units.