Implementation of Dual Control MPPT-based DC-DC Converter fed Solar PV Power Application

This paper presents an effective power extraction methodology from Photo Voltaic (PV) with a front end DC-DC Resonant converter with dual control. Usually, conventional DC-DC boost converter shows lower efficiency and extra components for soft-switching. Further, converter power transfer efficiency for PV integration is limited. Hence, to address these challenges this paper investigates an isolated DC-DC resonant converter with proposed control to attain wider voltage regulation with maximized PV power generation. In addition, this converter can achieve zero voltage switching under wider operating loads. The proposed control method improves the efficiency even under light load condition without effecting digital-signal-processor resolution, along with a simple Pertub and Observe maximum power point PI control approach. A 2.2-kW prototype is built and operated to interface PV system and to verify the performance over entire load. The peak efficiency of the converter is found to be 98.7% at (1.1-kW) 50% of the full load.