Research on Large Signal Stabilization Control of Energy Storage Grid-Connected Inverter

The constant power energy storage grid-connected inverters have typical nonlinear characteristics, and the micro-grid system based on energy storage inverters is difficult to run smoothly when subjected to large disturbances. Therefore, to ensure that the system can return to stable operation after large disturbance, it is necessary to analyze the large signal stability of the energy storage grid-connected inverter. In this paper, a nonlinear stability analysis method is proposed by using mixed potential function theory, and a stabilization control strategy based on large signal model is proposed. The simulation model of constant power energy storage grid-connected inverter is established by using Simulink module in MATLAB, and the large signal stability region is analyzed, and the control parameters are optimized. Finally, the actual platform is built and the related experiments are carried out. The experimental results show that the dynamic performance of the system is greatly improved, and the stability of the system is enlarged, thus improving the stability of the system.