An Improved Droop Control for a Low Voltage DC Microgrid Operation

Droop control is the widespread method for source converters parallel running in DC microgrids, however, this technique has some constraints. The difference in lines resistance is considered one of the main reasons of circulating current, poor of load sharing, and deteriorating voltage regulation. proper load sharing among converters must be ensured by the main control system of DC microgrids, minimum circulating current among sources and minimum voltage deviation. In this work, simple adaptive droop controller is proposed to cover the problems of classical droop control. The introduced algorithm is characterized by low voltage regulation with enhanced load sharing performance of the DC microgrids. The efficiency of the introduced methodology is tested under various operating situations. Simulation consequences show, the proposed technique performance is compared to classical droop control performance.