PV grid connected system controlled by sliding mode: Experimental implementation

In this work, we present an experimental study of PV grid-connected system installed in the Faculty of Sciences of Tunisia. This system is composed by a PV generator, a buck-boost DC-DC converter, a voltage inverter and a grid utility. Two control lows are developed in this work. The first is the sliding mode control applied to the dc-dc converter in order to insure the required reference DC voltage at the input of the inverter. The second control low is the direct power control whose controls the exchange of active and reactive power between the PV source and the grid. An experimental implementation of mathematical model of the PV system and its control lows is presented and experimental results have proved the effectiveness of the proposed study.