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Multi-Objective Power Management for EV Fleet With MMC-Based Integration Into Smart Grid

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Modular multilevel converter (MMC) is a possible solution for integrating an electric vehicle (EV) fleet into the smart grid. Considering the differences of initial state of charge (SOC) and the… Click to show full abstract

Modular multilevel converter (MMC) is a possible solution for integrating an electric vehicle (EV) fleet into the smart grid. Considering the differences of initial state of charge (SOC) and the inherent randomness in charge/discharge demands from the various EVs connected to the MMC, it becomes challenging to control the MMC in order to satisfy the network and EV fleet requirements. This paper proposes a multi-objective power management strategy for a MMC-Based EV fleet to be integrated into the smart grid using a virtual SOC model and coordinated control of the power flow among the arms of the same and different phase-units by taking advantage of circulation current. The model of the MMC-based EV fleet system is developed in MATLAB/Simulink and simulation results show that the multi-objectives of differential charging/discharging power control and interactive power management between EVs and utility can be effectively realized, while the three-phase output power of MMC is kept in balance and circulation current is controlled, thus, mitigating the negative impact of large-scale application of EVs on the utility grid.

Keywords: power; fleet; smart grid; power management; mmc based

Journal Title: IEEE Transactions on Smart Grid
Year Published: 2019

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