Abstract :
A fast and robust control strategy for a multilevel inverter in grid-connected photovoltaic system is presented. The multilevel inverter
is based on a dual two-level inverter topology. There are two isolated PV generators that feeding each bridge inverter. The output of each
inverter is connected to a three-phase transformer. The active and reactive powers flowing into the grid are controlled by a sliding mode
algorithm. An alfa–beta space vector modulator is also used. The inverters DC voltages are also controller by a sliding mode controller.
In this way, a fast and robust system controller is obtained. Several test results are presented in order to verify the effectiveness of the
proposed system controller.
2012 Elsevier Ltd. All rights reserved
