An energy management strategy for islanded DC microgrids. A case study on efficient energy exchange among residential houses

This paper proposes an effective energy management strategy for residential microgrid systems, specifically integrating battery energy storage systems and photovoltaic (PV) arrays. Given the increasing adoption of solar PV systems in both residential and industrial sectors, often operating in off-grid or hybrid configurations, efficient energy management is crucial. The presented strategy optimizes energy exchange among interconnected households by continuously monitoring battery state-of-charge (SOC), prioritizing critical loads, and intelligently utilizing surplus PV energy for secondary applications. This approach introduces three distinct operational modes, dynamically adapting to varying power generation and load demands. The proposed methodology ensures efficient energy distribution, prolongs battery lifespan, and significantly reduces reliance on conventional backup generators. Simulation results validate the effectiveness of the developed strategy in maintaining system stability while concurrently minimizing operational costs.