An Interconnected Prosumer Energy Management System Model for Improved Outage Resilience

Microgrids (MGs) are characterized by renewable distributed energy sources (DERs) and battery energy storage systems (BESSs) that enable off-grid operation. Some researchers are identifying these traits as capable of improving the dependability of grid networks in the event of significant outages. However, MGs have inherent voltage and frequency fluctuations that often require energy management systems (EMS). While a lot of research has focused on three-phase systems to solve these challenges, the authors of this article consider a single-phase DER interconnected system simulated with MATLAB/Simulink Power System Blockset. The simulated load model is improved to a mixed load that uses two cascaded Second-order Generalized Integrator (SOGI)-based quadrature-signal-generators (QSGs) Phase-locked loop (PLLs) for phase matching. The performance of the improved load model is verified through a group of interconnected prosumers in an off-grid environment with consideration for disaster outage situations, each running a proposed BESS SOC based EMS. The results point to the prevention of power outages for prosumers with a critical SOC over a three-day simulation period, which could help with disaster recovery.