To investigate the impact of the part-load characteristics of internal components such as compressor

air turbine and heat exchanger on the off-design operation of advanced adiabatic compressed air energy storage(AA-CAES)

detailed analysis on the part-load thermodynamics characteristic of each component and off-design operation of AA-CAES are performed. Dual state-of-charge(SOC)model is proposed including the gas storage level of the gas storage unit and the heat storage level of high-temperature thermal storage unit. With a set of off-design characteristic curves

coupling relationship between SOC of the thermal storage unit and SOC of the air storage unit is established. Thus an off-design operation model for the AA-CAES considering part-load characteristic of each component is established and estimation problem of wind power and energy storage hybrid system's generation capicity is analyzed. The simulation results show that the impact of part-load characteristics of each component resulting from the off-design operation of AA-CAES on the generation capacity of wind power and energy storage hybrid system cannot be ignored. Compared with the situation of ignoring off-design conditions

the capacity factor could discount over 4% caused by the off-design characteristics in the wind-rich areas.