Abstract:
The present study proposes a comparative analysis on the clean electric energy response given by two types of PV (photovoltaic)
tracking systems implemented on the same location: the azimuth and the pseudo-equatorial. The analysis is done based on an
algorithm applied on the two-axes and one-axis systems. The tracking is done according to various laws, obtained by combining
daily, seasonal and annual tracking programs. The algorithm and the comparative analysis are exemplified, by numerical simulations,
for Brasov, Romania location. Accordingly is reported a synoptic chart of the electric energy output delivered by the azimuth and
pseudo-equatorial tracked PV systems and are identified the optimum tracking solution. The results are compared based on the
tracking efficiency and PV system overall efficiency values. Moreover, the annual electric energy gain is estimated by comparing: the
two-axes against the one-axis, the one-axis against the fix-tilt and the two-axis against the fix-tilt tracking variants. Hence, the
optimum tracking solutions for Brasov, Romania are: a) for relatively small PV platforms (up to 100 m2): the one-axis pseudoequatorial
system tracked with an annual program for the diurnal motion and a seasonal program for the elevation motion and b) for
large PV platforms (up to 300 m2): the two-axes azimuth system, tracked with a seasonal program for the diurnal motion and a daily
program for the elevation motion.