Experimental wavelet transient-state analysis of electrical machines directly feeding by photovoltaic cells

Abstract

This work describes an experimental wavelet packet transient state analysis for educational purposes. The study particularly deals with electrical machines directly fed by photovoltaic cells. In a PV system design, the selection and proper installation of appropriatelysized components directly affects system reliability, lifetime and initial cost. In any installation, one must keep in mind that trade-ojjs are necessary in system design and component selection. In this study, the startup and nominal operating behaviors of electrical machines directly connected to a photovoltaic system (not having any storage or control system) were empirically examined. The power values obtained (in p.u.) were decomposed to sub-frequency components by means of the discrete wavelet packet transformation then they were compared to each other.