Seems to me that the problem is not so much in getting wind penetration above 30 percent, as in what to do with the over-production that will become increasingly more common then. Spillage is not nice, and you can only export so much to neighbouring countries (where there will tend to be high winds at the same time).

Actually it's an interesting situation: "free" electricity nowhere to go. In Germany (where the same problem is already seen due to grid limitations) they are experimenting with electrolytically producing hydrogen, to be added to the natural gas network. Hmm.