Method and system for stabilizing new energy power fluctuation based on compressed air energy storage system

The invention relates to a method and system for stabilizing new energy power fluctuation based on a compressed air energy storage system.The compressed air energy storage system comprises a compression module, a power generation module, an air storage module, a heat storage module and a Joule heating device, the air storage module is connected between the compression module and the power generation module, and the heat storage module is used for providing a heating medium for the power generation module; the Joule heating device is used for heating a heating medium in the heat storage module; the method comprises the steps that a low-frequency component Pfc and a high-frequency component Phf in new energy power Pgreen are separated, and the high-frequency component Phf is electric energy input of the Joule heating device; the proportion of first power Pg and second power Pc in the low-frequency component Pfc is determined, the first power Pg is on-grid power, and the second power Pc is electric energy input