Discrete Sliding Mode Controlled Cuk Converter for PV fed Highly Transient Loads

Abstract

This paper deals with the modeling and simulation of Discrete Sliding Mode Controlled (DSMC) Cuk converter for Photo Voltaic (PV) fed highly transient loads. Applications like hybrid electric vehicles, Hybrid micro grid and solar battery chargers uses PV fed Cuk converters which need efficient controller to maintain stable output. Conventional PV fed systems has poor efficiency due to its highly fluctuating input. In this paper, Discrete Sliding Mode Control strategy is introduced to improve the performance of Cuk converter so that the controller is robust, flexible and feasible with any digital hardware. The controller robustness is verified by introducing reference, input and load transients at different interval of time and the system stability is ensured. The output voltage settling time of the proposed converter is improved 50% and Percentage error in output voltage is zero. The performance of the proposed system is proved better with DSMC strategy compared with conventional controllers with the help of simulation results.