Compressed air energy storage method and device suitable for variable working condition operation

Abstract

The invention discloses a novel method and device for compressed air energy storage, and particularly discloses a compressed air energy storage method and device suitable for variable working condition operation. According to the compressed air energy storage method and device suitable for the variable working condition operation, the variable working condition input power range of input electric energy is divided into a plurality of levels, and all the power levels correspond to the pressure levels of a compressed air energy storage system. When the input electric energy power change is large, the variable working condition operation is achieved by changing the compressed air pressure levels of the compressed air energy storage system, and the electric energy is stored; when the input electric energy power change is small, the compressed air pressure levels of the compressed air energy storage system remain the same, the variable working condition operation is achieved by adjusting the flow of the compressed air, and the electric energy is stored. Compressed air of different pressures is stored respectively through a constant pressure storage mode. The compressed air energy storage method and device suitable for the variable working condition operation are adopted for carrying out compressed air energy storage, the fact that all the main equipment of a system runs around a rated condition all the time can be guaranteed under the condition that the electric input power changes frequently by a large margin, and therefore the energy storage efficiency of the energy storage system can be improved greatly.

Description

technical field [0001] The present invention relates to a method and device for storing energy by using compressed air, in particular to a method and device for realizing electric energy storage by comprehensively controlling the pressure and flow rate of compressed air to adapt to the performance of variable working conditions of input electric energy, especially It is suitable for situations where the input power changes frequently in a wide range, such as wind power generation and solar power generation. Background technique [0002] Compressed air energy storage technology is a kind of electric energy storage technology. The principle of traditional compressed air energy storage technology is: in the process of energy storage, electric energy drives the air compressor to compress air, converts electric energy into internal energy of compressed air, and stores In the air storage chamber; during the energy release process, the compressed air is released from the air storag...

AI Technical Summary

Problems solved by technology

This makes the air compressor always in the working state of partial load, and cannot run stably under the rated working condition, resulting in a great reduction in the efficiency of the equipment

Images