Compressed air energy storage'energy storage-power generation-phase modulation-dynamic support 'combined operation method

The invention provides a compressed air energy storage'energy storage-power generation-phase modulation-dynamic support 'combined operation method which comprises a compressor compressed gas energy storage operation mode in a conventional energy conversion process and an operation mode that an expansion machine does work to drive a power generator to generate power. And in the dynamic support mode, the expansion machine cavity is vacuumized after the energy release of the compressed gas is finished, and the power grid drags the generator set to synchronously idle. According to the invention, the low-loss synchronous no-load operation of the compressed air energy storage generator set can be realized, so that the generator set can fully utilize the high-inertia and high-overload voltage source attributes on the basis of exerting the supporting capabilities of energy storage, power generation, phase adjustment and the like, reliable inertia/reactive power support is provided for the system, and the system relia