Research ArticleImplementation of fuzzy-sliding mode based control of a grid connected photovoltaic system

- Real time implementation on dSPACE 1104 single board of a photovoltaic-grid connected system.
- A sliding mode controller for the maximum power point tracking of a photovoltaic generator using a boost chopper.
- Fuzzy logic controller (FLC) for the DC link voltage.
- A quasi-total transit of the extracted PV power to the grid under a unit power factor operation.

The present work describes an optimal operation of a small scale photovoltaic system connected to a micro-grid, based on both sliding mode and fuzzy logic control. Real time implementation is done through a dSPACE 1104 single board, controlling a boost chopper on the PV array side and a voltage source inverter (VSI) on the grid side. The sliding mode controller tracks permanently the maximum power of the PV array regardless of atmospheric condition variations, while The fuzzy logic controller (FLC) regulates the DC-link voltage, and ensures via current control of the VSI a quasi-total transit of the extracted PV power to the grid under a unity power factor operation. Simulation results, carried out via Matlab-Simulink package were approved through experiment, showing the effectiveness of the proposed control techniques.