A Novel Fast and Dynamic Support for Power Grid Control Strategy of CHB-BESS

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. Firstly, the mathematical model of cascade energy storage system is constructed and its basic operation mechanism is analyzed. Secondly, on the basis of its mathematical model, a new type of fast active support grid control technology is studied, and its control gain and other key control parameters are adjusted online based on the system boundary conditions to achieve fast dynamic response. Finally, the simulation results show that the proposed control strategy is correct and realizable.