Modelling Wind Speed Distributions in Selected Weather Stations

Abstract

Modelling daily wind speed data by using the two parameter Weibull distribution for ten selected weather stations in Sri Lanka is presented. The daily wind speed data measured by the Department of Meteorology at the heights of 6m-15m during the years 2001 and 2004 were used in this work. The annual variation of the fitted Weibull parameters, the shape parameter k and the scale parameter c ranged from 0.80 to 3.58 and 2.79 ms-1 to 19.78 ms-1 respectively. The highest values of the parameters were found in Hambantota and the lowest values were found in Kurunegala. It was seen that the daily wind speed distribution can be modelled with a reasonable accuracy, using the two parameter Weibull distribution for the stations considered in this work.