Application Research Of Laplace Wavelet Correlation Filtering Method Into State Analysis Of Hydroelctric Set

Hydropower has attracted more and more attention recently due to its character of flexibility of the output adjustment in the electrical industry and enormous potential resource。 With the development of electric power market, advancing competitive power of hydropower becomes the aim of the industry。 Improving operation stability of hydropower unit and developing investigative techniques of correlative failure diagnosis to carry out conditional maintenance for the power is the necessary requirement of power reformation。 Vibration is the import factor to affect the stable operation of hydropower generating units。 Vibration signal contained import diagnostic information that reflected estate of apparatus。 If could break down the complicated signal according to different fault model in correspond time domain character, then can find the locality of failure。At first, this paper explained background of the subject purpose of studying meaning of research and the current situation both at home and abroad form actual case of hydraulic power plant。 Analyzed the vibration mechanism and character when hydropower unit vibrated。 Explicated measurement parameter and appeal of measuring point arranged as processed analysis of experiments。Secondly, introduced several conventional methods of signal processing, emphasized definition and character of Fourier transform and wavelet analysis。 As the bilateral character of nonstationary signal, both of which can't adaptate complicated signal types, existed the problem of deliquation。 This paper induct Laplace wavelet analysis to the analysis process of vibration signal。 Simulation result indicated that Laplace wavelet had high precision when extract frequency of aircrew vibration signal。Eventually, carried through Laplace wavelet analysis to the signal of Vibration and swing that had been measured at the course of staring and closedown。 Conjugated the result of Laplace wavelet analysis and the failure characteristic frequency of hydropower generatingunits, assessment the running state and point out the potential problem, which is provided with guidance acceptation to the actualization of state examine and repair in hydropower plant...