The smart grid technology and the distribution system continuously improved through the
generation. The need of the storage power increased as to stabilize the distribution system.
As the power production form power plant produce more during off peak hour, the
potential exist for the power to be stored.
Several concepts are introduce for power storage such as using thermal, freewheel,
hydroelectric and compressed air. Compressed Air technology uses the atmosphere air as
the material for storage. The compressor captures the atmosphere air and store the
material into the storage. The storage then released the stored energy to the generator to
produce power. The process of storing the material can be done during the off peak hour
and release during peak hour.
High pressure storage capable of storing a lot of material while at the same time
release heat which reduce the efficiency. Low pressure storage while store much less
material, the efficiency much higher than the high pressure storage. The storage however
require large storage area.