Ed joined NREL in 1992 and is a member of the Transmission Grid Integration group. His research projects are in the fields of electric machines, power electronics, and power systems, with emphasis on renewable energy applications. He has been involved with many different projects for industry and utilities, including variable speed wind turbine development; electric machine design and optimization; isolated operations (battery charging, self-excitation, and water pumping); and wind power plant design (collector system equivalent), operation, dynamic model development, and system integration. He has written numerous publications and was the recipient of an IEEE Prize Paper. He holds two patents in renewable energy power conversion for a variable speed wind turbine generator and a peak power tracker for photovoltaic applications. He collaborates with the Utility Wind Integration Group, Western Electricity Coordinating Council, Midwest Independent System Operator, and the Electric Reliability Council of Texas in the area of dynamic modeling and analysis.