Performance analysis of Solar PV under Partial Shading Condition using Globalized MPPT Algorithm

Abstract

Solar power offers a crucial solution to diminishing fossil fuel reserves and curbing greenhouse gas emissions. Its widespread adoption promotes sustainable and clean source of energy. With advanced technologies, enhanced efficiency and reduced cost in solar power system, the utilization of solar energy becomes increasingly apparent, nurturing a transition towards a more sustainable and environmentally friendly energy landscape. newlineMaximum Power Point Tracking (MPPT) is crucial in solar photovoltaic (PV) systems to optimize energy extraction from solar panels. Traditional MPPT methods struggle when shadows disrupt solar panels, causing multiple local maxima in the power-voltage curve. Hence, there is a need of MPPT techniques which intelligently navigating through multiple power peaks and ensure optimal power extraction, mitigating efficiency and losses associated with partial shading. In this research, to confront these challenges, a globalized MPPT (GMPPT) method is developed which is based on variable duty cycle (VDC) to track maximum power in rapidly changing atmospheric conditions, including partially shaded scenarios. newlineDC-DC converters are crucial in solar systems to efficiently convert variable DC voltage from solar panels to a stable voltage. In light of this context, a high-gain converter is essential for elevating voltage levels, eliminating the need for a transformer on the AC side. While prior research has explored various derived DC-DC converters to achieve newlinev newlinelarger gains, this often necessitates an increase in the number of components. To address this challenge, a hybrid high-gain DC-DC converter is proposed, designed to have fewer components and lower voltage stress. Simulations as well as experimental validations were conducted to confirm the usefulness of the proposed approach. newlineFurthermore, an integrated PV system with globalized MPPT algorithm and the innovative hybrid high-gain converter is developed.