大规模压缩空气储能技术是实现电网削峰填谷,解决风电、光伏等波动性新能源并网消纳问题的有效手段。以高压容器为主的储气模式建设成本较高,限制了其装机容量和推广应用。盐穴储气具有建设成本低、占地面积小、技术成熟、密封性好、储气压力高、安全稳定等优点,可以满足大规模先进绝热压缩空气储能的储气技术需求。文章首先介绍了盐穴储气技术的特点,进一步结合江苏金坛压缩空气储能国家示范项目,阐述了基于盐穴储气的先进绝热压缩空气储能系统(salt cavern advanced adiabatic compressed air energy storage,SC-AA-CAES)的工作原理,分析了系统的关键技术问题。最后,针对未来智能电网发展趋势,探讨了盐穴压缩空气储能技术的应用前景。
Large-scale compressed air energy storage(CAES) is an effective way to shift electricity from peak periods to off-peak periods, and utilize photovoltaics, wind power and other new energies, fluctuant and intermittent. However, high pressure air storage tank increases construction cost, limiting installed capacity and application scope. Salt cavern air storage technology could meet requirements of air storage of advanced adiabatic CAES for its advantages of low construction cost, small land occupation, technology maturation, fine sealing, high reliability and high safety. In this paper, features of salt cavern air storage technology are presented firstly. And then, working principle and key technological issues of advanced adiabatic CAES with salt cavern air storage are expounded based on Jintan national demonstration project, Jiangsu. Finally, potential application prospects of CAES with salt cavern air storage in future power grids and microgrids are discussed.