Comparative analysis of incremental conductance base MPPT for multi-string photovoltaic system

This work presents a simulation comparison of three algorithms developed in order to maximize the output power from a photovoltaic (PV) system for the same given set of conditions. The maximum power point tracking (MPPT) methods proposed in this study are three extended algorithms : fixed step size (FSS) Incremental conductance method (ICM), variable step size (VSS) ICM and Advanced VSSICM. Among all the MPPT strategies, the incremental conductance (INC) algorithm is widely employed due to easy implementation and high tracking accuracy. In this paper, a PV system based on a boost converter as MPPT device is considered. The different MPPT algorithum is simulated in PSIM 9.0 with simplified `C' Programing. This paper compare the effect of step size on the performance of MPPT.