Abstract
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This paper presents a global optimum design method for horizontal axis wind turbine (HAWT). The method refers to the wind speed distribution function on the specific wind site, with the objective to satisfy the maximum annual energy output, using complex method to carry on the global optimum searching. A 600 kW HAWT was designed with the wind speed distribution function on the Nan'ao wind site. The design results were compared with the original data of NM 600 kW HAWT to show the rationality. The comparison between the results of the Wilson method and the global optimum design method shows the advantage of the latter.