ADRC Control for a Single-Stage Photovoltaic System Connected to the Three-Phase Electrical Grid

Abstract

This work aims to study the active disturbance rejection control ADRC associated with incremental conductance IC (ADRC-IC), applied to the single-stage grid-connected PV system under atmospheric variation conditions, to control the maximum power point MPP. The control technique is compared with the conventional perturb and observe P&O control. ADRC is also used to control the inverter, connected to the grid through an RL filter, to keep the DC bus voltage constant concerning the reference provided by the MPP control unit and also to ensure a unit power factor at the power injected in the network.