Demonstration of a DC Microgrid with Central Operation Strategies on an Island

This paper introduces and discusses a DC microgrid constructed on an island. KEPCO constructed a DC microgrid system on an island called Seogeochado (West Geocha Island) through the `DC Island' project. With regard to the DC Island project, which operates a DC system from generation source to customer, this paper examines the development of LVDC equipment and the implementation of an LVDC microgrid system based on calculations of the optimal renewable energy capacity performed by HOMER, an economic feasibility analysis tool. Also, this paper suggests a centralized operation method for the DC system that optimizes the operation of a DC microgrid on an island and discusses its demonstration.