[ProtectOurFreedom]

Compressed air isn't used to turn the wind turbine blades. Electric power from wind drives a large electric motor coupled to an axial air compressor which pressurizes and underground cavern or aquifer. The air is released from the cavern, mixed with natural gas, and fires a combustion turbine. The CT is coupled to an electric generator. The storage of the highly compressed air smooths out the wind power which is available only a few hours a day. Using such a large "battery" allows you to turn an unreliable source such as wind into a reliable baseload generating option.

[Pontiac]

Well that makes sense. But that is not what the article seems to be talking about.

Both companies said they'll also research whether compressed air can be stored and used to drive the wind-driven turbines at times of low winds or peak demand.

[Stegall Tx]

Wow ... that’s quite an idea. I wonder if a variation of that could be used here in the D/FW area with the Barnett shale? As I understand it, natural gas is trapped in relatively small geological structures. Why not drill down into one, use the gas out of it, pump compressed air back into that structure and use the structures around it to provide the gas for the next stage?

Seems that it might cut out the need to create a cavern in the salt dome ... the cavern is already there.

Just an idea.