Comparative analysis of Backstepping and ADRC Approach used in PV System connected to the Grid

Abstract

The aim of this paper is to ensure high performances of grid connected photovoltaic power system using DC-AC power inverters. It is susceptible to power grid disturbance, sudden environment changes and parameters uncertainties. Based in this characteristic, comparison between robust Backstepping controller and active disturbance rejection control (ADRC) strategy are developed. The two control algorithms are required to extract the maximum power of the solar energy, to maintain constant the DC-bus voltage, and to inject a suitable current into the grid with power factor near unity. Therefore, the Analysis and simulation of the ADRC and Backstepping controllers are validated with MATLAB/ Simulink software. It is showed the superiority of the backstepping technique through simulation results. Otherwise, The ADRC has only two parameters design, which make it easy to implement.