The micro compressed air energy storage system is a new type of energy storage systems capable of being combined with flywheel to form a hybrid energy storage system.The structure and principle of a hybrid energy storage system based on micro compressed air energy storage is described.The governor system model of micro compressed air energy storage is proposed based on the experimental data，which simulates the dynamics of pressure，temperature，valve，and turbine and so on.Finally，a comparison between experimental data and simulation results is given to verify the applicability and effectiveness of the proposed model.