Could it be that at times each turbine consumes more than 50% of its rated capacity in its own operation?! If so, the plant as a whole -- which may produce only 25% of its rated capacity annually -- would be using (for free!) twice as much electricity as it produces and sells. An unlikely situation perhaps, but the industry doesn't publicize any data that proves otherwise; incoming power is apparently not normally recorded.
Interesting thought from:
http://www.aweo.org/windconsumption.html
Also stated in other articles.. MOST wind farms produce less than 20% of their capacity.. many much less than 20% of their capacity..
If you want to produce X of kWh you need at LEAST 4 times the production capacity to meet that goal.
You need 10 kWh of power, and you find a Wind Turbine rated at 10kWh capacity, you'll need more than 4 of them to get what you want.