This report was prepar ed as an acco un t of w o r k spo nsored by an agency of t he Uni ted States Governm en t. Neith er th e Un ited States Government nor any agency th e reo f, nor any o f th ei r em p loyees, m akes any wa rran ty, ex press or i m pli ed , or assum es any leg al lia bili ty or respo nsi bil ity for th e accuracy, comp leteness, or use fu lness of any informati o n, apparatus, p roduct , or pro cess disclose d , o r re pr ese n ts t hat its use w oul d no t i nf rin ge pr ivately owned rig ht s. Reference herein to any speci fi c co m mercia l p rod uct, pro cess , or se rvice by trade name , tr adem ark, man ufacture r, o r oth erw ise, does not necessa rily co nst it ut e o r im ply its end o rseme nt, recomme nd at io n, or favoring by t he Un ited St ates Govern me nt or any agency t hereof. Th e views and opinions of au thors ex pressed herein do no t necessa r ily state or ref lect t hose of the U n ited St ates Governm ent o r an y agen cy t hereof.

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EXECUTIVE SUMMARYThis report summarizes the development, testing and verification of quasidynamic or operating strategy computer models of the MOD-OA and the MOD-2 wind turbines. These models simulate the specific turbines• operations based on their individual operating strategies and power curves and predict power output.For large-scale wind turbines to be taken seriously, their Cost of Energy (COE) is very important. In the computation of COE, the numerator is composed of the expenses involved in the acquisition and operation of the source. The denominator is the annual energy production or, in the case of a wind turbine, the energy capture. Calculation of an estimated energy capture by a given wind turbine at a specific site uses a •static• approach: typically either hourly wind speed averages over the period of a year or the Probability Distribution Function (PDF) of those winds, a wind-to-power transfer function, and possibly a little heuristic reasoning to account for the losses due to normal operational constraints. In this report, comparisons of this static approach and the operating strategy model approach generally show significant disparities. The magnitude of the disparity appears to be site-specific and is a function of the wind speed and direction variance rather than the annual mean speed or the site PDF.