Power-Voltage Curves Calculation via Numerical Continuation for Droop-Based Islanded Microgrids Including Storage Systems

This paper presents a continuation scheme for droop-based controlled microgrids including energy storage systems. This scheme is used to determine the steady-state system behavior, specifically the power-voltage curves calculation. Two case studies are presented, in the first study the power-voltage curves are calculated considering changes in the control droop characteristics; in the second case, the increase of the battery capacity is considered. The results show that the power-voltage curves calculated depend on the control parameters and the battery model, demonstrating that conventional power system analysis requires advanced modeling when considering microgrid systems.