MPPT for PV System Based on Variable Step Size Perturb and Observe Algorithm
Abstract: This paper presents
some improvements on the Perturb and Observe (P&O) method to overcome the
common drawbacks of conventional P&O method. The main advantage of this
modified algorithm is its simplicity with higher accuracy results, compared to
the conventional methods. The operation of the entire solar Maximum Power Point
Tracking (MPPT) system was observed through two different approaches, which are
through MATLAB/Simulink simulation and hardware implementation. A small scale
of hardware design, which consists of solar PV cell, boost converter and
Arduino Mega2560 microcontroller had been utilized for further verification on
the simulation results. The simulation results that was carried out by this
modified P&O algorithm showed improvement and a promising performance:
faster convergence speed of 0.67s, small oscillation at steady state region and
promising efficiency of 95.23%. Besides, from the hardware results, the
convergence time of the power curve was able to maintain at 0.2s and give
almost zero oscillation during steady state. It is envisaged that the method is
useful in future research of Photovoltaic (PV) system.
Author: Awang Jusoh, Rozana
Alik, Tan Kar Guan, Tole Sutikno
Journal Code: jptkomputergg170020
