Feedback control strategy for state‐of‐charge balancing and power sharing between distributed battery energy storage units in DC microgrid

Abstract Different line resistances between battery energy storage systems (BESSs) and the bus cause problem of state‐of‐charge (SOC) unbalance batteries. SOC brings about over‐charge or over‐discharge, which reduces life. This paper proposes an feedback control strategy to achieve both output power sharing equalization BESSs. The average batteries is set as reference each loop, objectives are achieved by regulating voltage converters. state space model proposed method established for stability analysis parameter design. parameters then designed in detail according dynamic steady‐state performance. Simulation experiment verified that can accurate when capacities different.