In the heart of Rwanda, a quiet revolution is taking place, one that could reshape the future of electricity distribution in developing nations. Researchers, led by Obed Nkuriyingoma from the Department of Energy Systems Engineering at Kocaeli University in Türkiye, have demonstrated a significant improvement in grid reliability by integrating solar photovoltaic (PV) systems with Battery Energy Storage Systems (BESS) at the distribution level. Their findings, published in the journal *Engineering Reports*, offer a promising solution to the escalating energy demand and the pressing need for a consistent power supply.
The study focuses on the Gatumba and Ntongwe feeders of Rwanda’s electricity network, which, like many radial distribution networks, face challenges in maintaining a reliable power supply. By introducing solar PV systems combined with BESS, the researchers aimed to evaluate the impact of renewable energy sources on grid reliability. “The integration of solar PV systems with BESS not only increases the generation capacity but also reduces the interruption frequency and duration,” Nkuriyingoma explained. This approach is particularly relevant for regions with limited infrastructure and high energy demand.
The researchers configured protection switches to ensure that the PV systems and BESS could supply load demand even in the absence of the grid. This setup allowed them to assess the reliability improvements brought about by the integration of these renewable energy sources. Using DigSILENT PowerFactory and PV*SOL simulation tools, they found that the system reliability improved by 71.6% and 95.5% for system average interruption frequency and duration, respectively. These findings highlight the potential of solar PV systems with BESS to enhance grid reliability significantly.
The commercial implications of this research are substantial. For the energy sector, this study provides a roadmap for improving grid reliability in developing countries, where power outages can have severe economic consequences. By integrating renewable energy sources with energy storage systems, utilities can reduce downtime, increase customer satisfaction, and potentially attract more investment in renewable energy projects.
Moreover, the success of this pilot project in Rwanda could serve as a model for other nations facing similar challenges. As Nkuriyingoma noted, “The integration of renewable energy sources with energy storage systems can be a game-changer for the energy sector, particularly in regions with limited infrastructure.” This approach not only addresses the need for a consistent power supply but also promotes the use of clean energy, contributing to environmental sustainability.
The findings from this study could shape future developments in the field by encouraging more utilities to explore the integration of renewable energy sources with energy storage systems. As the energy sector continues to evolve, the lessons learned from Rwanda’s experience could pave the way for more reliable and sustainable electricity distribution networks worldwide.