Abstract

When electric vehicle (EV) arrives at the full occupied fixed charging station (FCS), the EV will have a waiting time for quite some time. EV operator could dispatch mobile charging station (MCS) to the overload FCS providing extra charging pole on the FCS. MCS are determined as an electric vehicle equipped with several charging poles and/or limited energy storage. Dispatched MCS was divided into two categories; MCS_nES and MCS_wES. The MCS_nES was determined as MCS unit equipped with several charging poles without any energy storage. This unit connects the inlet to the power grid and undertake on-grid charging mode to assist the overload FCS. MCS_wES was determined as MCS unit equipped with energy storage so it can undertake off-grid charging to the EV outside FCS without connected to the power grid. The entire algorithm consists of six procedures: request CS location, EV arrival/registration, request MCS, cancel donate MCS, cancel request MCS and charge complete. An internet-base information management system was designed to facilitate the communication between CS server, EV, MCS and FCS. The procedure helps the EVs to improve their waiting time when they are queued in full FCS.

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