Low frequency operation and micro-controller implementation for
multilevel quasi Z source inverter in photovoltaic application
Abstract
A microcontroller based pulse width modulation implementation for
multilevel quasi Z source inverter is proposed in this paper. The
component design of quasi z source inverter (qZSI) is first considered
with continuous and discontinuous mode of operations. The low switching
frequency operation of multilevel quasi Z source inverter is proposed in
this paper. The detailed modelling for qZSI is then established for
effective implementation of PIC microcontroller (PIC 16F877A) for
generating the switching signals. A prototype of five level quasi
z-source inverter have been developed and the control signal to the gate
drivers have been applied by properly adjusting the shoot through and
non shoot through switching states. The hardware result shows the
effective implementation of the proposed scheme.