There are three types of wind power transformers:
1. For relatively small wind power generation (such as about 1MW), the transformer is placed outside the tower, similar to the American box-type transformer. As far as I know, there are many manufacturers currently manufacturing this. The earliest and most numerous one is Zhejiang Xiangshan Tianan Transformer Company.
2. Medium-sized wind power generation (about 1.5MW or more) is placed under the tower. It is also produced in Tianan.
3. The larger wind power generation (2.5MW) is placed in the tower, but in the upper cabin. It is technically difficult and demanding, and it is said that it has been successfully developed by the American DuPont Company and Kunming Segmai Electric Co., Ltd.
Don’t know which one you want to know?