Rod Speed wrote:
dpb wrote
....

There are a number of those using hydro systems that get the storage
by pumping water up at time of excess supply from the baseload coal
generators and return that power to the system at times of excess
demand by letting the water down again. ...

I am fully aware of pumped hydro storage. They're of da'ed little value
for the locations of most wind farms on the High Plains where there are
(a) no hills, (b) no surface water.

--