DESIGN OF CONVERTER FOR NON CHAOTIC OPERATION OF SOLAR PV SYSTEM

Abstract

The paper presents a new design approach for the parameters of the dc-dc boost converter to address the non linear dynamics and issue of chaos in the process of maximum power point tracking (MPPT) in solar energy systems. The operational requirements of dc-dc converters employed in MPPT applications differ widely from their conventional voltage regulation applications. The emphasis augurs to minimize the voltage and current ripples and explore a fresh direction to arrive at the appropriate values of the inductor and capacitor. The approach entails standard test conditions and involves perturb and observe algorithm to articulate the theory. The methodology attempts to uphold the system stability with a view to identify the pathways to bifurcations and eventual transition to chaos. The MATLAB based simulation results adequately validated through a prototype strives to keep the operating point of the MPPT system in the stable operating region and improve their performance necessities such as fast tracking of MPP, reduced oscillations around MPP, reduced current rating for the switch, higher conversion efficiency and higher voltage gains. The experimental results forge to validate the formulation and evince a fresh scope for the effective use of solar power in the real world applications