Multi-objective power management strategy for MMC-Based EV Fleet Integrated into smart grid

A modular multilevel converter (MMC) is a possible solution to integrate EV fleet into grid by embedding EVs into the DC link of each sub-module of MMC. However, considering differences of initial SOC and charge/discharge demand for each EV connected to the MMC, it is a big problem to control the MMC with EV fleet to reach the multiple control objectives such as responding to utility dispatching commands, dynamic power control according to the charging/discharging demand from each individual EV. In order to address the mentioned control objectives, this paper proposes a multi-objective power management strategy for MMC-Based EV fleet to be integrated into smart grid friendly based on virtual SOC model. A MMC-based EV fleet system model is established in Matlab/Simulink to verify the availability and feasibility of the proposed system and multi-objective power management strategy. The results show the proposed strategy is able to realize the charging/discharging power differential control and interactive power management between EVs and utility as well as to reduce the negative impact of large-scale application of EVs on utility.