how to build a prodject on wind turbines?

Answer 1

what is your question?

Answer 2

You need to define more clearly what a "project" is. Are you preparing a 3 page paper, a science project, or a major presentation?

You should
1) demonstrate the potential energy available from wind power
2) show how some of that energy can be captured using wind turbines
3) discuss different types of turbines and their relative advantages and disadvantages
4) discuss conditions/locations that are suitable prospects for wind energy recovery
5) discuss how to deal with the inevitable problems of irregular winds, excessive wind, maintenance, etc. In other words, show how how a useful, realizable system can be built.

I would consider those points to be a bare minimum. It's a huge field. You could pick only one tiny part and be able to do a whole project just on that.