Design and simulation of a modified sliding mode controller evaluated with a conventional P&O MPPT controller for solar applications

This article gives an ample idea about Sliding Mode Controller (SMC) implementation to a DC-DC boost converter for a Solar system to track Maximum Power Point (MPP). SMC implementation accompany three criteria´s; they are Hitting, Sliding Mode (SM) Existence and Stability. One diode Photovoltaic (PV) model is designed for lighting applications, and PV output is connected to a boost converter to regulate and enlarge the voltage up to desired level. SMC is implemented in a feedback manner with capacitor voltage and inductor current. The steady state condition occurred less than 0.1sec time, and tracks around 10% more power at Standard Test Conditions (STC). The SMC results are compared with fixed step P & O MPPT controller; the models are simulated in MATLAB/SIMULINK.