Principles of compressed air energy storage technology

　　Compressed air energy storage is the process of using the remaining electricity generated during low load periods in the power system, driven by an electric motor, to compress air into a closed, large capacity underground space serving as a storage chamber. This involves converting non storable electrical energy into storable compressed air pressure potential energy and storing it in the storage chamber.

　　When the power generation of the system is insufficient, compressed air is mixed with oil or natural gas through a heat exchanger for combustion, and then introduced into a gas turbine for power generation to meet the peak shaving needs of the power system. The energy storage subsystem composed of a compressor, electric motor, and gas storage chamber stores low-priced electricity from the low valley of the power station in gas storage chambers such as rock caves and abandoned mines through compressed air. During energy storage, the electric generator and compressor are coupled through a coupling and decoupled from the gas turbine.

　　During peak load in the power system, compressed air combustion is used to drive gas turbines for power generation. Gas turbines, combustion chambers, and heaters are used to generate electronic systems. During power generation, the electric generator is coupled with the gas turbine and decoupled from the compressor.

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