Application of modern non-linear control techniques for the integration of compressed air energy storage with medium and low voltage grid

Compressed air energy storage is a well-used technology for application in high voltage power system but researchers are also investing efforts to minimise the cost of this technology in medium and low voltage power system. Integration of this energy storage requires a robust control of power electronic converter to control the power injection due to the dynamic behaviour of the system. The conventional linear control design requires a thorough knowledge of the system parameters, but the uncertain disturbances caused by the mechanical properties of the energy storage is neglected in the design and the system fails in presence of such instances. In this paper an adaptive control based boost converter and sliding mode control based three phase inverter for grid integrated compressed air energy storage system of up to 1kW has been presented which can mitigate any uncertain disturbances in the system without prior knowledge of the system parameters. The experimental results along with simulation results are also presented to validate the efficiency of the system