An efficient partial feedback linearization current controller for grid connected photovoltaic system

This paper aims to present an efficient nonlinear current control scheme for a single-phase grid-connected photovoltaic (PV) system in which the controller is designed using partial feedback linearization and a linear controller. The proposed controller solves the difficulty of tuning the gain in conventional linear controllers under changing atmospheric conditions. The performance of the controller is evaluated based on the tracking of grid current to the reference current by considering the changes in solar irradiation levels. The comparison between the current tracking of the partial feedback linearization with PI and PR controllers are also presented.