Comparison of Incremental Conductance with Fuzzy Controller for a PLL-Less Scheme for Grid-Interfaced PV System

In modern days, necessity of electrical power has increased due to rapid industrial growth. With this, dependence on conventional energy increased, the depletion of its sources started, and here, renewable energy sources like solar, wind and tidal energy sources started to act as alternate energy source and are playing a crucial role among which solar is quiet important. The proposed scheme serves two purposes such as extraction of maximum power from a PV cell along with mitigation of harmonics. Secondly, a notch filter scheme is designed to eliminate phase-locked loop, and this filter extracts the real component of load current which is previously done by PLL. As phase-locked loop is eliminated, system dependence on PI controller tuning decreases and thereby dynamic response and robust nature of system increases. Along with this, a fuzzy logic-based maximum power point tracker (MPPT) is proposed and compared with incremental conductance-type power point tracker.