Large-scale renewable energy grid connection brings great challenges to the safety and stability of grid operation

and the application of advanced energy storage technology can well solve this problem. Isothermal compressed air energy storage technology is a new promising energy storage technology with simple structure

flexible configuration and high efficiency. This paper introduces the basic principle of isothermal compressed air energy storage and its isothermal control technologies

analyzes the research progress of existing isothermal compressed air energy storage technologies

and focuses on analyzing and comparing the main features of pumped compressed air energy storage technology and ground-level integrated diverse energy storage technology. On this basis

the future development direction of isothermal compressed air energy storage technology is prospected

the key problems that need to be studied and have not been solved are presented.