A new fault diagnosis method for a rotor of a steam turbine generator set based on instantaneous energy distribution characteristics

In order to catch typical fault characteristics of a rotor of a steam turbine generator set under nonlinear and nonstable states,a new instantaneous energy(IE) distribution characteristics extraction method based on Hilbert-Huang transformation(HHT) was presented have,it was used to recognize different operating states(such as,normal state or oil whip,et al.The physical relationship between instantaneous energy and structural state variation of a system was analyzed theoretically.With HHT,the instantaneous energy distribution feature of an unstable vibration signal was obtained,according to the relative contribution qdcmtization method of the instantaneous energy,its noise was eliminated,the typical character of the instantaneous energy was dicussed using correlative coefficients.A new fault diagnosis method for a rotor of a steam turbine generator set based on instantaneous energy distribution feature was established.The experimental results showed that this proposed method is effective.