Grid connected and off grid operation control strategy of cascade energy storage system based on equivalent rotor equation

Conference: ECITech 2022 - The 2022 International Conference on Electrical, Control and Information Technology
03/25/2022 - 03/27/2022 at Kunming, China

Proceedings: ECITech 2022

Pages: 4Language: englishTyp: PDF

Authors:
Fan, Zhenning; Su, Qiang (State Grid Tianjin Electric Power Company Chengdong Power Supply Branch Tianjin, China)
Li, Yuelong; Liu, Huan; Yin, Shi (China Electric Power Research Institute Co., Ltd Nanjing, Jiangsu, China)

Abstract:
With the continuous development of power electronics technology and the large-scale access of new energy power generation, the stable operation of the power grid is facing huge challenges. Medium voltage cascaded energy storage system with its high power, high conversion efficiency and high capacity utilization has received more and more attention. In this paper, firstly, the topology and internal mathematical model of cascade energy storage system are analyzed. Secondly, according to the application condition of microgrid, the high-precision closed-loop control method of power and voltage of cascade energy storage system in grid connected and off grid state is studied, and a parallel off grid switching control method based on equivalent rotor equation is proposed. Finally, a simulation model is built based on MATLAB / Simulink simulation software to verify the realizability and correctness of the proposed control strategy.