Grid integration of electronic devices & systems at Medium Voltage

Power Electronics in grid interfaces, whether for generation, transformation, or utilization of power offer many benefits over today´s electromagnetic and electromechanical interfaces. Power electronic grid technologies promise precise control, and speed of control, of grid voltage and currents, including fault currents. The challenges/obstacles are primarily cost, reliability, ruggedness and efficiency. However, there are both opportunities and barriers afforded by this technology in its ability to transform faults, protection, safety and power quality in our T&D system. This paper discusses three distinct Medium Voltage (MV), power electronic, grid interface devices that represent the full range of this potential. First, a commercial, integrated, inverter platform product for renewables is presented, then a MV static transfer switch for micro-grids, and finally, a DOE/ARPA-E sponsored solid state inverter for direct MV connection of renewable generation sources.