In general, we produce more wind energy than people use during the winter, and less than people use during the summer. Over the course of a year, the amount of wind energy produced balances with the amount people use. I've read that there's enough wind in just a few states, including Wyoming, to supply all the electricity for the whole country. While it is theoretically possible to produce enough energy from wind turbines to supply all our needs, it's not technically feasible at present. Since electricity can't be stored in large amounts, we still need other resources to ensure that energy is available when people need to use it.
Research continues on the effect of wind generation on electric system reliability.
The National Renewable Energy Laboratory is currently conducting studies of the benefits of geographically dispersed wind facilities on system reliability. In addition, future developments in energy storage technologies could greatly improve our ability to make better use of the area's abundant wind resource. However, there are a series of transmission constraints in the area that need to be addressed before the site can be developed much further. After Phase III is completed this summer, we will have 10 turbines installed at the site. It may be possible to add another 1-3 turbines before changes to the existing transmission infrastructure are required.