Turbulence Intensity's Effects on Methods of Estimating the Weibull Distribution for Wind Speed Data

Abstract

The wind speed distribution and Weibull distribution are essential in the assessment of wind resorce. Linear regression is usually used to estimate the Weibull parameters for a wind data. However, it is known that there could be a large error in the estimated Weibull parameters for a wind data of a complex terrain site. The authors believe that a cause of the error is that the wind of a complex terrain has large turbulence component. Actually, the result of analysis showed that a large value of the turbulence intensity caused a large error of the averaged wind speed of the estimated Weibull distribution. This paper gives an example of a relation between the turbulence intensity and the error of the estimated Weibull distribution and a difference in the estimation by some methods. © 2007, The Japan Society of Mechanical Engineers. All rights reserved.