Characterisation of wind speed series and power in Durban

Abstract

Both the planning and operating of a wind farm de-mand an appropriate wind speed model of its loca-tion. The model also helps predict the dynamic be-haviour of wind turbines and wind power potential in the location. This study characterises the wind speed series and power in Durban (29.9560°S, 30.9730°E), South Africa, using Markov chain and Weibull distribution. Comparison of statistical quan-tities of measured and Markov model-generated wind speed series revealed that the model accurately represented the measured wind speed series. The Markov model and Weibull distribution were also compared through their corresponding probability density functions. The root mean square error of the Markov model against the measured wind speed se-ries was nearly one-tenth that of the Weibull distri-bution, indicating the effectiveness of the former. Fi-nally, the analysis of wind power density showed that Durban and its environs need large wind tur-bines with hub heights greater than 85 m for efficient utilisation of the available wind energy.