Mission-Profile Based Design of a Hybrid-Grids Feeding Smart Transformer

Abstract

The increasing number of electric vehicle charging stations and photovoltaic power plants makes the usage of LVdc grids more and more attractive. A Smart Transformer (ST) can provide dc connectivity, however, its multiple conversion stages can impair an efficient operation. To provide higher efficiency by offering different power paths an “interconnected“ architecture for the ST can be utilized for the connection of multiple isolated ac and dc grids. This work proposes a mission-profile based design procedure for a hybrid-grids feeding ST, which shows an inherent opportunity for downsizing of power converter rating and the capability of increased fault tolerance.