NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. Contract No. DE-AC36-08GO28308 Applications of Systems Engineering to the Research, Design, and Development of Wind Energy Systems K. Dykes and R. Meadows With contributions from: F. Felker, P. Graf, M. Hand, M. Lunacek, J. Michalakes, P. Moriarty, W. Musial, and P. Veers Technical Report NREL/TP-5000-52616 December 2011