Power Ripple Reduction in Cascade Boost Converters Using PI-Based MPPT Control for Solar Cells

It is crucial to operate PV panels at maximum power due to their low power generation capabilities.There are various types of control methods referred to as MPPT (Maximum Power Point Tracking) algorithms.Among these, the ES (Extremum Seeking) control algorithm, which is a type of MPPT algorithm that provides fast response in nonlinear systems, is used in this study.However, high ripples occur in the output power of the PV system operated at the maximum power point using the ES algorithm.These ripples negatively affect the performance and lifespan of the PV panel and also increase the switching cost in the converter fed by the PV panel.To overcome these drawbacks, in this study, the classical ESC (Extremum Seeking Control) method has been positively enhanced.The developed new controller is simulated in the Matlab/SIMULINK environment in a system consisting of a DC-DC cascade boost converter and PV panel.According to the obtained results, it is observed that the proposed controller reduces the power ripples existing in the standard ES control and provides a more stable and efficient operation of the PV system.