Research on Micro-small Scale of Compressed Air Energy Storage System

The unsteady output characteristics of renewable energy such as solar and wind energies have large effect on the safety of electric grid. The application of energy storage system not only can regulate electric grid load and improve power generation quality,but also can be used as an emergency electric source. The different ways of energy storage are analyzed. The effect of storage pressure and flow rate of compressor and expander on output power and efficiency of small scale compressed air energy storage system( CAES) are researched. It is put forward that each single wind power apparatus is equipped with a small CAES, and relative key technologies are pointed out. The paper is significant to the development of energy storage system and safety of electric grid.