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Different horizons of the application of Weibull distribution for Wind resource assessment: a case study for the Brazilian Northeast region
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Datum
2014
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BIS-Verlag
Zusammenfassung
This paper aims to apply the Weibull distribution in the annual and semiannual horizons to contribute to
the assessment of wind energy potential in three cities located in Northeastern Brazil (BRNER) region.
The potential for wind power in a period can be evaluated by a probability density function such as the
Weibull distribution. Different methods for calculating these parameters, including the method of
equivalent energy, developed to optimize the application of this frequency distribution to the data
collected in northeastern Brazil, were tested. This research seeks to optimize the fit to the data of wind
speed and contribute to the reduction of errors in the analysis of wind potential of cities located in the
Brazilian Northeast. According to the analysis, it was found that the reduction of the horizon of
application provides better efficiency in the adjustment of calculated and observed frequencies. It was
also observed that the Weibull distribution applies satisfactorily to the data collected in coastal cities
and its efficiency is reduced when applied to distant cities on the coast. Among all analyzed methods for
calculating the parameters (k and c) of Weibull distribution, the method of equivalent energy was the
one which performed better.