Autonomous control of electric vehicles in grid-connected and islanded modes

In this paper, an autonomous control for the operation of multiple electric vehicles (EVs) in low voltage networks is proposed. The system under study is a low voltage residential network with multiple EV charging systems. The residential network is operated at grid-connected and islanding modes. The proposed control is capable to autonomously work in grid-connected mode while in islanding mode it supports the network operation by means of vehicle-to-grid (V2G). The control just relies on local measurements of voltage and currents. Neither islanding detection nor communication links between vehicles are needed. For purpose of study the performance of the control, modeling of a low voltage residential network and the EV charging system are also included. MATLAB/Simulink simulations are performed to validate the proposed modeling and control.