Active Disturbance Rejection Control Applied to a Three-Phase Grid-Connected Photovoltaic System

Abstract

The objective of this work is to propose an active disturbance rejection control (ADRC) for a two-stage grid-connected photovoltaic (PV) array. ADRC combined with incremental conductance (ADRC_IncCond) is used to extract the maximum power from the PV array and compared to the fuzzy logic control (FLC) and the perturb and observe (P&O) algorithm. A two-stage inverter is also controlled by ADRC to keep the DC bus voltage constant and provide a unity power factor to the power supplied to the grid. The performance of the control is evaluated, under varying atmospheric conditions, by simulations in the Matlab Simulink environment.

Keywords

• fuzzy logic control
• maximum power tracking
• photovoltaic system
• reactive power control
• voltage control