Wind Energy could be stored in Huge Underground Salt Caverns and released during low seasons

Wind turbines encounter difficulties during the energy production because there are fluctuations in wind speed during different seasons. The main problem is that the peak seasons in energy production are not the same as the peak seasons for energy consumption. Therefore, it is wise to store the energy for later use. Engineers in Utah are working on a huge project that will make the storage of wind energy easy. They are going to adapt the old salt mine caverns and store the compressed air in them. The principle is easy, wind turbines will generate electricity for the air compressors that will send air to the caverns during the high seasons. The compressed air will be released during the low seasons, when the wind speed is not high enough and the electricity will be generated by the compressed air. Although there were similar projects in Alabama and Germany, the size of the current project in Utah is enormous. Storing air is much cheaper and more convenient than storing energy in the batteries. Therefore, this technology is very promising. 

Source->

http://www.pddnet.com/news/2014/09/huge-underground-salt-caverns-could-store-wind-generated-energy