A multi-purpose battery energy storage system using digital twin technology

This paper presents a concept of multi-purpose Battery Energy Storage System (BESS) which is integrated into a large wind farm (WF). The BESS aims to suppress the fluctuation of the output of active power and reactive power of the wind farm WF, participate in frequency regulation and damp low-frequency oscillations. Firstly, the concept and structure of the multi-purpose of BESS is presented. After that, the digital twin technology is applied to configure the capacity of the BESS. The performance of the multi-purpose BESS is demonstrated in the twoarea system model constructed using DIgSILENT PowerFactory. The simulation results show that the multipurpose BESS significantly improves the stability of the system in terms of suppressing the fluctuation of the out of WF, frequency regulation and damping low-frequency oscillations, which is the essential step to the practical implementation of the multi-purpose BESS.