PV Fed Sliding Mode controlled SEPIC converter with Single Phase Inverter

The main objective of this work is to effectively utilize solar energy. The output of a photovoltaic system is given to the sliding mode controlled SEPIC converter, to operate PV panel at maximum power point. A second order SMC is also used to control pulses of single-phase inverter and the regulated 230V 50Hz AC signal is obtained which is supplied to a resistive load. The application of SMC at both ends allows efficient operation for changes in weather and load conditions. Conventional MPPT algorithms i.e. incremental conductance, P&O techniques have low tracking efficiency and high oscillations, which may be effectively resolved using sliding mode control (SMC). It is perceived from the analysis that SMC controls the voltage more efficiently with higher value and less fluctuations as compared to conventional methods. The statistical analysis in terms of mean voltage, standard deviation of voltage and mean power also prove the superiority of proposed scheme.