Abstract
This paper presents the controlling of a three-phase double stage photovoltaic system grid connected. The control law must ensure the following three objectives: (i) the voltage provided by PV panel must be controlled to achieve the optimum power by controlling the input voltage of DC/DC converter; (ii) regulating the DC link voltage to a constant reference value; (iii) Providing a current with sinusoidal waveform and in phase with the grid voltage by controlling DC/AC converter (Power Factor Correction). To meet these purposes, a multi-loop nonlinear controller is established making use the Backstepping technique with Lyapunov tools.
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