WInd turbine generator and construction method for wind turbine tower

摘要

{Abstract} Provided is a wind turbine generator having a tower structure that can cope with increases in the size and height thereof while avoiding the restrictions of transportation limits. In a wind turbine generator in which a nacelle is installed at a top portion of a monopole type wind turbine tower, in which tower shells (2a) having circular cylindrical shapes are connected together, to generate power, the tower (2) is provided with a double-tube structure (20) at least at the bottom end of the tower.