Exploration of Nonlinear Dynamics in Boost MPPT for a Solar PV System

摘要

The paper attempts to analyse the nonlinear dynamics of a dc-dc boost converter applied as a maximum power point (MPP) tracker for a solar panel. The MPPT becomes crucial for any solar PV system to exploit the maximum available power in addition enjoying the long-time investment benefits of a solar PV system. The dc-dc converters used for tracking MPP encounter sub-harmonic oscillations owing to variations in the irradiation and temperature and therefrom lead to bifurcation and chaos. The system experiences a deteriorating performance and necessitates exploring the phenomena in the perspective of a MPPT control framework. The focus envisages a study of the stable periodic operation and/or chaotic operation of the converter under different values of irradiation through continuous and discrete time domain waveforms and phase portraits of the state variables. The investigations include evaluating the performance through simulation for different values of irradiation and provide a predictive foray for illustrating the suitability of the use of the system in practice.