On the micro-inverter performance based on three MPPT controllers

Abstract

In this paper the study about micro-inverter is proposed, based on the three Maximum Power Point Tracking (MPPT) technique for photovoltaic (PV) system: Perturb and Observe algorithm (P&O), advanced Extremum Seeking (aES), modified Extremum Seeking (mES) controls. The study is made with the dynamic standard test EN 50530 which uses various test sequences. The simulation results allow the comparison of MPPT efficiency for the three algorithms that have been tested. The dynamic performance is tested for three levels of frequency: low, medium and high frequency. MPP efficiency at low frequency is 97%, for advanced Extremum Seeking Control (aESC). MPP efficiency descends to 96% for modified Extremum Seeking Control (mESC) and 94% for P&O algorithm.