Comparative characterization study of the variability of wind energy potential by wind direction sectors for three coastal sites in Lomé, Accra and Cotonou

Ayite Senah Akoda Ajavon, Akim A. Salami, Mawugno K. Kodjo, Koffi-Sa Bédja


This paper presents the characterization of the distribution of wind speeds across sectors of directions in order to study
the variability of wind energy potential on sites in Lomé (Togo), Accra (Ghana) and Cotonou (Benin) in the Gulf of
Guinea. To this end, we developed a software application in MATLAB aimed at wind data processing. Each site’s wind
speed data collected over a period from January 2000 to December 2012 at a height of 10 m above the ground were
divided into eight sectors of direction of 45 degrees each, according to the wind directions measured. Parameters such
as K (shape factor) and C (scale factor) of Weibull distributions as well as the skewness and kurtosis coecients were
obtained for each sector. The study analyzes the variations of the statistical parameters computed based on the number
of hours during which wind blows in each sector of direction. The results show that the South and South-West sectors
are areas of prevailing winds and have higher wind energy potential compared to other sectors in general on the 3 sites
considered. The more frequent the wind blows in a sector of direction, the higher the Weibull parameters, while the
coecients of skewness and kurtosis of the distributions of wind speeds show a downward trend for all 3 sites.


Wind energy potential, Weibull Distribution, Compass rose, Modeling

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