Original Extremum control method implemented in MPP photovoltaic systems

Abstract

The paper presents a novel, original control strategy in order to increase the efficiency of the renewable energy systems. The proposed algorithm uses the Extremum System framework, continuously adjusting the manipulated variable in order to maintain the output as near as possible to its extreme value. The maximum point seeking algorithm is an original, simple one, based on the analysis of the slope sign, realized with sample and hold elements. The advantages of the method are highlighted by simulation results.