Abstract
The work presented in this thesis describes how an optimal operation of a small scale grid
connected photovoltaic system can be achieved. In fact, the two stages PV system permits
through the elaboration of the various control techniques to fulfill two main goals:
1- A permanent extraction of the maximum PV power regardless atmospheric conditions
variations.
2- A flexible power flow of the extracted power to the grid under a unity power factor.
The main objective is achieved via the application of some intelligent MPPT algorithms,
such as sliding mode and fuzzy logic to tune the PV side converter, while the second goal is
realized through the application of different control routines (PI and Lyapounov based control)
to switch the grid side voltage source inverter.
The results obtained numerically in MATLAB-Simulink package were validated
successfully via a test bench, built in the Electrical Engineering Laboratory of Biskra (LGEB),
where the implementation of the proposed control strategies were carried out on the acquisition
and control card dSPACE1104.
Key-words:
Photovoltaic generator, DC-DC converter, MPPT, sliding mode controller, FLC, DC-link,
grid, unity power factor.