Abstract
We have to know the property of air movement in hub height of wind turbine on understanding that we want to utilize of wind power economically. We can calculate wind speed from near ground measurement to hub height but always have mistake in results depend on applied method. In Hungary the Hungarian Meteorological Service carried out expedition wind measurements with SODAR equipment to study wind potential of the country within a frame of a scientific competition. We analysed SODAR data from Budapest, Paks and Szeged with statistical method looking for answer to our following question: How can frequency distributions of wind speed and wind direction in different height change? Are there any differences in form of wind profiles and in wind power in different wind direction sector? How can daily course of wind speed and potential of wind energy in different height change? At the same time, we suppose that there is a so-called “inflection altitude,” where the daily course of the wind speed and wind energy is random. We try to determine this altitude on the basis of tower measurements in Paks. Finally we get an example to the distribution of specific wind power according to parts of the day.
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