1. Renewable and Sustainable Energy Institute (RASEI), University of Colorado Boulder, Boulder, CO, USA
2. Integrated Grid and Energy Systems-Power Delivery and Utilization (IGES-PDU) Group, Electric Power Research Institute (EPRI), Palo Alto, CA, USA
3. National Renewable Energy Laboratory (NREL), Power Systems Engineering Center, Integrated Devices and Systems Group, Golden, CO, USA