Design of Multi-Staged Power Electronic Interface for Stand-alone Application Powered by Photovoltaic Module

This paper provides design details of a multi-staged power electronic interface (PEI) which is used to process the low output voltage of photovoltaic module and deliver power to stand-alone load. The PEI comprises of an active-clamp current-fed full-bridge isolated converter and a single-phase voltage source inverter. Active-clamp current-fed full-bridge isolated converter is used to step-up the low voltage of PV module to a desired DC-link voltage. Perturb and Observe maximum power point tracking is used to control the DC-DC converter and fixed-frequency sliding mode control technique is used to control the single-phase inverter because the said control technique reduces the chattering effect of classical sliding mode controller and provides good steady state as well as dynamic voltage regulation during sudden change of load profile.