Good question Brian. There is a wind farm southeast of where I live that spans about 75 miles. There are thousands of wind turbines.
I heard the first installed units were one megawatt and the newer units were rated at 1.5 megawatt. Mitsubishi Power Systems is one name associated with this wind farm.
When construction started several years back the first thing that came to my mind was how in the heck do they phase all those things out. I thought they might be DC generators that feed an inverter station but couldn't find anything that resembled one plus the distances involved with this farm would make DC transmission impractical because of I2R losses. I actually got really close to some of the turbines and it looks like a typical pad mount transformer ( step up? ) sits next to each one. There are no overhead lines associated with them, everything is underground. I did find a newly constructed substation nearby and it looked like the overhead transmission lines leaving it were probably in the 230KV range.
An associate of mine told me the turbines generate three phase alternating current @ 575 volts and have some type of control mechanism to control them. I also heard they have optical fiber routed from each one back to a control house.
Fascinating stuff.