AUTHOR=Chen Qing , Xie Rui , Chen Yuyan , Liu Heyu , Zhang Shengqi , Wang Fei , Shi Zhaohui , Lin Bin 

TITLE=Power Configuration Scheme for Battery Energy Storage Systems Considering the Renewable Energy Penetration Level

JOURNAL=Frontiers in Energy Research

VOLUME=Volume 9 - 2021

YEAR=2021

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2021.718019

DOI=10.3389/fenrg.2021.718019

ISSN=2296-598X

ABSTRACT=With the increase of the renewable energy penetration (REP) level in the interconnected power grid, the proportion of the grid-connected conventional synchronous generators reduces continuously, resulting in the decrease of the system inertia. The insufficient system inertia brings challenges on the system frequency stability. Battery energy storage systems (BESSs), regarded as the high-quality frequency regulation resource, play an important role in maintaining the frequency stability of the system with the high REP level. To configure the proper power of BESS in the system frequency regulation, a BESS power configuration scheme (PCS) considering REP constraint is proposed in this paper. In particular, the process to obtain REP boundary of the interconnected grid on the premise of the system frequency stability is included in PCS, and the optimal power configuration of BESS is further determined on the analysis of the BESS impact on REP boundary. Furthermore, a simulation model of 5-area Australia interconnected power grid is built in Matlab/Simulink, and the proposed REP constrained PCS is verified and analyzed. At last, the promising results show that PCS can take full advantages of BESS in the frequency regulation, and meet the system requirement of the frequency stability on a particular REP level.