Electronic power transformer to secure the power supply of a mission critical microgrid

The increasing penetration of distributed renewable energy resources and increasing in participation of demand response from consumers make the microgrid become a favorable option for future power system development. Since some loads are mission critical and require 24/7 uninterruptable supply, a smart microgrid is expected as an effective architecture to serve this purpose. This paper proposes the application of electronic power transformer (EPT) to improve the controllability and reliability of a mission critical microgrid. The application scenarios of EPT in the microgrids are analyzed in detailed. Some case studies including applying the EPTs into a grid connected microgrid, among autonomous microgrids, and between two microgrids are analyzed. The simulation results demonstrate the potential of the EPT in enhancing the controllability and reliability of the microgrid.