A Novel Integrating Configuration and A Power Distribution Method for MMC-Based Grid-Connected PV System with Integrated Batteries

摘要

This paper proposed a novel integrating configuration and a power distribution method for modular multilevel converter (MMC)-based grid-connected PV system with integrated batteries. Based on a three-phase system with two different sources, PV can achieve the maximum power output, and the battery can flexibly adjust its output and serve as a backup power source according to the grid dispatching. Considering the imbalance of battery state of charge and voltage of PV on the DC side, a balance control method by controlling the circulating current is adopted. Finally, simulation results are presented to verify the effectiveness of the proposed control method.