A Self-adapting Control Strategy to Improve Performance of AGC with Battery Energy Storage System (BESS)

Battery energy storage system (BESS) is a kind of flexible and reliable new source, an increasingly important part in frequency modulation (FM) service. In this paper, a self-adapting control strategy is proposed for multiple BESSs in power system combined with traditional generators working to improve the performance of automation generation control (AGC). In details, different control objectives are taken into consideration to ensure the comprehensiveness of strategy including smaller frequency deviation, higher economic performance and better status of BESS. Furthermore, the factors of grid and the information of BESS are designed as key elements affecting the weighting factors of different control objectives, which results in self-adapting change of the strategy according to the changes in power grid. Two cases of the AGC with proposed strategy are conducted in Matlab/Simulink and the results of the simulation and calculation indicate superiority of self-adapting strategy compared with common control strategy.