HIGH EFFICIENT STANDALONE PHOTOVOLTAIC POWER SYSTEM Novel MPPT and Sun Tacker

This book proposes an efficient stand alone PV system by considering two approaches. The first approach is by developing an efficient maximum power point tracking (MPPT) controller of the PV system while the second approach is by developing an accurate model of an active sun tracker. To achieve an efficient MPPT controller, a new boost converter design and an improved MPPT algorithm are incorporated. In the proposed boost converter design, a passive regenerative snubber circuit is included to absorb the energy of stray inductance so as to reduce the IGBT switching losses. As for the improved MPPT algorithm, it is based on the curve fitting method which attempts to predict the power-voltage characteristic curve by a polynomial function of the fourth order. In the second approach for the development of an efficient PV system, a new open loop tracking algorithm is introduced to calculate the optimum tilt angle at which the installed collector should be slanted to collect the maximum solar radiation