The Comparative Study of the Wind Speed Distribution in Pakpanang District of Nakhon Si Thammarat Province

Abstract

This research is to comparatively study of wind speed distribution at Pakpanang district in Nakhon Si Thammarat province in order to search the appropriate methodology for describing the characteristics of statistical wind speed. The statistical wind speed obtained from measurements at height of 120 m a.g.l. for 1 year in 2014, was analyzed using Weibull distribution and 3 methodologies to determine the scale and shape parameters, i.e., Maximum Likelihood, Least Square, and WAsP to obtain the average wind speed. Wind power density and the ratio are also analyzed and compared. Results show that the Maximum Likelihood method is the appropriate method to analyze the average wind speed with the highest accuracy and close to the average of the statistical analysis followed by the Least Square and WAsP methods respectively.