Dynamic Surface Controller for a Three-Phase Grid-Connected Photovoltaic System

In this paper, a dynamic surface control is designed for a grid-connected photovoltaic (PV) system. The latter consists of a PV generator connected to a three-phase grid through a DC/AC converter. The purpose is to extract maximum power from the PV generator with control of the power exchange and the improvement of the quality of the current injected into the grid. With the proposed controller, the power factor and the DC-link voltage can both be controlled using the same control algorithm, in contrast to the existing backstepping or DSC-based control methods. Besides, the presented control method helps to avoid the problem of explosion of complexity and ensures the stability of the closed-loop system. Finally, the performance of the controller is examined using a numerical simulation.