Capacity configuration of compressed air energy storage systems with consideration of variable operating conditions

The extensive integration of high proportions of new energy poses difficulties to the secure and stable operation of power systems. Compressed air energy storage (CAES) technology, as a large-scale, long-duration energy storage technology, has garnered significant attention. However, CAES systems often work in off-nominal conditions, leading to the issue that capacity configured based on nominal conditions may struggle to meet the demands of wind and solar energy consumption. This paper conducts an in-depth study of the off-nominal operation characteristics of CAES systems, constructs a variable operation condition configuration model for CAES systems, and proposes a configuration method for scenarios involving wind and solar energy consumption. Numerical examples have proven that the proposed configuration method can effectively mitigate the fluctuation of new energy output and satisfy the demand for combined heat and power supply.