Get a good utility industry lawyer and approach the power company that owns the lines you're going to be using. They have to offer fair access to their power lines, but there are a huge number of federal and state regulations that you must follow as an Independent Power Producer. At that level of generation, you're going to have a voltage impact on the grid, and you'll have to employ someone 24-7 to regulate voltage output of your wind farm as directed by the transmission dispatchers.
I'm not trying to dissuade you from the endeavor. Just make sure you've got a lot of subject-matter experts at the ready for the feasibility study. Good luck!