ISSN 2196-5625 CN 32-1884/TK
1. National Renewable Energy Laboratory, Golden, CO 80401, USA 2. ABB Inc., Raleigh, NC 27606, USA 3. Department of EECS, The University of Tennessee, Knoxville, TN 37996, USA
This work was supported by the U.S. Departmentof Energy under Contract No. DE-AC36-08GO28308 withAlliance for Sustainable Energy, LLC, the Manager and Operator ofthe National Renewable Energy Laboratory. Funding provided byU.S. Department of Energy Office of Energy Efficiency andRenewable Energy Wind Energy Technologies Office.