A Droop Control for the Autonomous Operation of DC Distribution System using Grid-tied Converter and Energy Storage

직류급전 시스템의 Autonomous Operation을 위한 교류연계장치와 에너지 저장의 Droop Control

This paper describes a droop control method for the autonomous operation of DC distribution system using distributed generations and energy storage. The method suppress the circulating current, and each unit could be controlled autonomously without communication system. Detailed model of wind power generation, photo-voltaic generation, fuel-cell generation and battery was implemented with the user-defined model of PSCAD/EMTDC software that is coded with C-language. The simulation and experimental results confirms that the proposed DC distribution system make it feasible to provide power to the load stably and verify effectiveness of the proposed method.