Variability in the Wind Spectrum between 10−2 Hz and 1 Hz

Wind is an abundant, yet intermittent, source of renewable energy, with speeds changing both spatially and temporally over a wide range time scales. While wind variability well documented on large meteorological scales the behavior turbulent flow at high frequencies understood, there remain questions in literature regarding intermediate region these domains. Understanding microscale, here considering frequency 10−2 Hz < f 1 Hz, key for turbine control modeling. In this paper, we quantify conditions tower Eolos research station Minnesota using power spectral density analysis. Spectral analysis samples similar mean was conducted to test hypothesis that spectrum’s shape independent speed. Historical speed data were compared evaluated identify diurnal, seasonal, interannual trends spectrum above 10−3 Hz. We conclude following Kolmogorov −5/3 law flows incoming wind, some variations slope magnitude. no conclusive or observed, it shown magnitude can occur