Here's a pretty cool post from our friends over at EcoGeek:
Largest Operational Wind Farm in the World
Currently, Horse Hollow Wind Energy Center in Texas is the world's largest with a 735 MW capacity. Emphasis on “currently” – there is a whole lot coming down the pipeline that will dwarf the project. But, as far as operational single wind farms, this is the world’s biggest. The problem is, right now, any planned wind project bigger than Horse Hollow can claim to be the "World's Biggest." Hence the constant flow of "World's Biggest Wind Farm" headlines.
Largest Planned Project
That would be the Pickens’s Texas Project (2014) that will generate 4 GW, right? At least you thought so…Actually, the Pickens plan is beat by both and the 4.5 GW Tehachapi Renewal Project (2013) and South Dakota’s Titan Wind Project (date not set), which will generate over 5 GW. Kind of jaw-dropping, but considering the wind conditions in the Dakotas, not too surprising. The 900 MW Columbia River Project (already under construction) may hold the title for a while, but will be quickly beaten out by plants in the gigawatt range.
Largest Planned Offshore Project
The UK gets this one with its London Array project, expected to have a capacity of 1 GW. While sounding almost small compared to some of the planned onshore projects, this is a pretty big deal for offshore wind power generation.
Check out the rest of the article for 3 more "largest ____" projects.