Developing a grid-connected power optimization strategy for the integration of wind power with low-temperature adiabatic compressed air energy storage

• Published in: Renewable energy 2018-09, Vol.125, p.73-86
• Main Authors: Tong, Shuiguang, Cheng, Zhewu, Cong, Feiyun, Tong, Zheming, Zhang, Yidong
• Format: Article
• Language: English
• Subjects: Compressed air energy storage; Grid-connected power optimization; Large-scale wind power; Levelized cost of electricity; Thermodynamic analysis
• ISSN: 0960-1481; 1879-0682
• DOI: 10.1016/j.renene.2018.02.067

Compressed Air Energy Storage (CAES) is considered as one of the key solutions to handle intermittent and random wind power. However, limited energy conversion efficiency and high capital cost of energy storage have restricted significantly the integration of wind power with CAES. In this study, a grid-connected power optimization strategy based on piecewise averaging of real-time wind power and electricity price data is developed to ensure continuous and stable power outputs to the grid using modified profit-maximizing algorithm. Thermodynamic analysis on the performance of low-temperature adiabatic CAES, energy conversion, and economic evaluation were carried out for a hybrid wind/low-temperature adiabatic CAES system (wind/LA-CAES) with pressure vessels. The proposed optimization strategy reduced the required capacity of CAES and the levelized cost of electricity (LCOE) significantly with greater utilization of wind power and operation profitability. The findings presented in this study is of significant reference value to future development of large-scale wind power integrated with CAES. •A power optimization strategy is developed to improve the economic feasibility of wind/LA-CAES systems.•Piecewise constant power outputs ensure continuous and stable power outputs to the grid.•The proposed strategy maximizes the wind power utilization and minimizes required storage capacity.•This study is of significant value to the development of wind/CAES systems.