ISLANDED MODE MICROGRID AUTOMATION BY USING DROOP CONTROL METHOD FOR STRANDED ZONE IN BANGLADESH

Abstract

Distributed generation (DG) is a critical component of the emerging microgrid concept, which enables sustainable energy integration within a distribution network. Inverters are critical components of DG unit operation since they connect energy sources to the grid utility. By combining inverters with feasible control mechanisms, the interface may be enhanced successfully. These controllers are critical in microgrids since they help to increase the system's performance, stability, resilience, and dependability. In Bangladesh, areas like Saint Martin, Hatia are remotely located where this type of microgrid automation can be implemented. The microgrid can be operated in grid-connected and island mode. Different control strategies like droop control, master-slave control, circular chain control, average current sharing control can be used to perform grid in island mode. In this study, a hierarchical droop control methodology has been used. In a conventional droop control system load-dependent on the frequency and voltage regulation become poor. In this research, it has been observed that the hierarchical droop control network shows stable power-sharing with improved voltage and frequency regulation. Extensive simulations have been carried out to validate the proposed control strategy’s effectiveness in terms of rapid transient response and stabilization of voltage, frequency, and power equitability among the micro sources in the islanded microgrid.