PURSE 2000

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Grid connected wind turbines-Sri Lanka experience
(University of Peradeniya, 2000-12-16) Ekanayake, J. B.
All over the world wind energy sources are becoming widely used as environmentallv friendly. small scale energy sources. In Sri Lanka. first grid connected' wind farm is now installed in Hanbantota as a pilot project. In this paper a simple model. which can be used to represent a grid-connected induction generator especially as a fixed speed and a variable speed wind turbine. is presented. Modifications that are required in the model for the analysis of variable speed wind turbine are performed. The characteristics of the fixed speed and the variable speed operation of the induction generator are obtained using the mathematical model developed. The wind statistics obtained from a site 2 km away from the pilot wind farm in Sri Lanka is analyzed. The output yield so far from this pilot wind farm is compared with the expected output. Advantages of variable speed wind turbines oyer fixed speed wind turbines for the site studied is also discussed. Finally. problems associated with grid connection of fixed speed and variable speed wind turbines are highlighted.