Design Aspects of Medium and Low Voltage DC Distribution Grids - An Overview

Abstract

The use of DC distribution grids for medium and low voltage level is debated in current research. In order to support future investigations on the planning and operation of medium and low voltage DC distribution grids, this paper summarizes identified recommendations and open research questions regarding the systemic design of medium and low voltage DC distribution grids. The considered design aspects include the relevant grid equipment, the grid concepts to be used, the neutral point handling, the grid protection as well as the preferred structural design and rated voltages.