Hardware-in-Loop Real-Time Simulation for Battery Energy Power Conversion System Based on RT-LAB

For a large-capacity Battery Energy Storage System (BESS), the Hardware-in-loop (HIL) simulation can verify the reliability of complex Control & Protection (C&P) device, and test the Power Conversion System (PCS) operation performance under severe power grid conditions, after the system design and components assembly. HIL can dramatically decrease on-site commissioning workload, and save operation and maintenance costs. In this paper, the typical PCS circuit and control strategy are analyzed firstly. Then, for the PCS with high switching frequency, a precise modeling and simulation method is proposed and studied based on FPGA with electric Hardware Solver (eHS) technology. Besides, a PCS HIL simulation platform is established based on PCS C&P device of a practical BESS product and RT-LAB simulator. Finally, the C&P strategy and PCS performance are tested and verified on this platform.