A parallel simulation analysis of energy storage converters based on nonlinear inductance modeling

In order to describe the working conditions of the inverter inductance in actual work more accurately, this paper proposes a simulation model of parallel connection of energy storage converters based on nonlinear inductance modeling. Firstly, the mathematical model of nonlinear inductance based on tan−1 function fitting is introduced, and the equivalent fixed-value inductance model of nonlinear inductance is obtained. Then the suppression method of “PI+R” low-frequency zero sequence circulation is proposed. The simulation results show that the method can suppress low-frequency zero sequence circulation. Finally, the model is established by PLECS, and the method proposed in this paper is verified.