Stability Analysis on Large-Scale Adiabatic Compressed Air Energy Storage System Connected with Power Grid

In this paper, the stability of adiabatic compressed air energy storage (ACAES) system connected with power grid is studied. First, the thermodynamic process of energy storage and power generation of ACAES system is analyzed. Then, the stability analysis model for stability analysis, which takes both ACAES and permanent magnet synchronous motor/generator into consideration, is built. According to the stability analysis model, the stability of grid connected ACAES is mainly influenced by structure parameters and coefficients of the control systems. A grid connected ACAES station, which is being built in Henan Province, China, is selected as the research case for the stability analysis. Influence of structure parameters and control coefficients on the system stability are studied in details. According to the analysis results, the equivalent resistance of ACAES system and the proportional coefficient of controller shows obvious influence on the capability of the grid connected system. The proposed stability analysis model and analysis results in this paper contributes to the stability analysis of large-scale grid connected ACAES system and providing advises for the parameter design process.