Integration of Distributed PV System with Grid Using Nine-Level PEC Inverter

In this paper, packed E-cell converter (MPEC) topology is investigated when integrated with three different PV sources of two different voltages and power ratings. Nine-level hybrid PWM with half parabola vertically shifted carriers is used which gives lesser THD when compared with triangular carrier waves. The advantage of the investigated topology is that the MPEC can continue a five-level operation even if a fault occurs on four-quadrant switch, without a change in topology. The modelling of the investigated system is done in MATLAB®/Simulink, and results obtained are presented and discussed in the paper.