Assessment of Power Level Variations in a Small PV System

There is a significant content of high variations of power levels in a PV system. This variations are considered as an deterioration of power quality and therefore should be quantified, further minimised. The ripple content in the power curve was assessed with wavelets. A bell shaped function was correlated to a power curve using optimisation techniques. It resulted in a very compact characterisation of the power curve and enabled conceptual correlation between real power curve and power output line required by the utility.