Enhanced Load Sharing for Energy Storage Systems in DC Microgrids Through Modified Droop Control
摘要
Battery Energy Storage System (BESS) is widely used to store energy and provide uninterrupted power to the critical load. The State of Charge (SoC) of the BESS must be balanced to extend its lifespan and prevent overusing a particular battery. When paralleling BESS-based voltage sources, the droop controller is used to share the power autonomously among BESS units. In this study, three distinct droop control strategies based on the SoC balancing of BESSs are discussed and analyzed. Then, a proposed control method that improves the SOC sharing performance is presented. The stability of the proposed method is assessed and its modeling is carried out using MATLAB/Simulink and PLECS simulation software.