Abstract:
This research examines the reactive power compensation effects of a grid-connected off-board electric vehicle (EV) battery charger used as a grid-to-vehicle (G2V) and power generator. The charger’s grid-facing front-end AC-DC cascaded H-bridge bidirectional converter controls power flow between the grid and EV battery via a back-end DC-DC bidirectional converter.
To ensure user safety, the charger setup isolates the user end galvanically. The suggested control algorithm controls EV and battery current to follow G2V and V2G active power commands and utility grid reactive power commands as requested.
System phase estimation and generated reference current synchronization are done with an adaptive notch filter-based controller. PLL is eliminated from the controller design by the proposed algorithm. With enhanced steady-state and trainset performance, controller computational complexity decreases.
In addition, MATLAB/Simulink is used to simulate a 12.6 kVA off-board charger and verify the control method during G2V, V2G, and reactive power adjustment EV charger operation.
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