Shading Factor Estimation in Small-Scale PV Systems

In this paper we propose a method to accurately estimate effects of partial shading on a small-scale PV system. Current of each PV string is measured and along with the output voltage of the PV array are used in order to estimate the shading intensity and shaded area of the array. First, the string current variations are used to recognize partial shading condition (PSC) and estimate shading intensity. Later, using the output voltage variations, shading factor is calculated. The proposed system is then simulated under two scenarios and the method is verified by the simulation results. These findings help us find the best location for small-scale PV systems; a place where there is minimum shading.

کلیدواژه ها:

photovoltaic systems (PV) ، partial shading condition (PSC) ، shading intensity ، shading factor