A modified perturb and observe maximum power point tracking algorithm for a standalone single phase photovoltaic system using boost converter

Abstract

The photovoltaic solar energy becomes more and more one of the most abundant and an alternative source of electric energy. But its efficiency is very low. For this reason, several Maximum Power Point Tracking algorithms are used to track de maximum power. This paper proposes a modified Perturb and Observe (P&O) algorithm using a boost chopper. That algorithm was implemented under Matlab/Simulink/Simpowersystems/Simelectronics platform. Results obtained showed that the proposed algorithm gives better results compared to the conventional P&O algorithm. In fact, the extracted power’s ripple factor using the conventional P&O method varies from 3.35 % to 5.30 %. Whereas the extracted power’s ripple factor using the 'modified P&O' varies from 1.41 % to 2.86 %.