OPTIMIZATION OF A GRID-CONNECTED SOLAR PHOTOVOLTAIC SYSTEM WITH BATTERY STORAGE

Abstract

In recent years, rooftop solar photovoltaic systems have gained significant traction due to their cost-effective and environmentally friendly approach to power generation. However, the sporadic availability of solar energy and the unpredictable duration of daylight hours limit the efficacy of autonomous rooftop solar photovoltaic systems. Hybrid rooftop solar power systems have emerged as a viable solution to address the limitations above by integrating solar photovoltaic technology with supplementary power sources such as battery storage and grid connectivity. This paper designs and proposes a strategic control to optimally operate the rooftop photovoltaic system with battery storage with two objective functions: life cycle cost and CO₂ emissions. The paper simulates the photovoltaic system in three cases: off-grid, grid-connected without storage, and grid-connected with battery storage. Simulation is performed using Matlab software; the life cycle of solar PV systems is 20 years. The results show that the case of grid-connected with battery storage gives the best results regarding both life cycle cost and CO₂ emissions.