There are three kinds of wind power transformer:
1, relatively small wind power generation (such as 1MW or so), the transformer is placed outside the tower, similar to the American box change. Well, as far as I know, there are more manufacturers now. Relatively early and more is Zhejiang Xiangshan Tian An transformer company.
2, a medium-sized wind power point (about 1.5MW) is placed in the Taneidi. It is also produced by cheonan.
3, a larger wind power generation (2.5MW) is placed in the tower, but in the upper cabin. Technically difficult and demanding, it is said that the United States DuPont Co and Kunming SEG Electric Limited has been developed successfully