EMS Strategy for Accommodation of High Solar Intermittency in PV Plants with EV Parking Lot and VRB in Hybrid Storage Configuration

This paper proposes an energy management system (EMS) power dispatch algorithm for a set of various distributed energy resources such as distributed generators and energy storage system in hybrid configuration (HESS) connected to a 1-MW power grid system. The HESS is composed of a stationary centralized Vanadium Redox Battery and decentralized energy storage system represented by Li-ion electric vehicle (EV) charging parking lot at a commercial workplace. The proposed EMS incorporates vehicle-to-grid and grid-to-vehicle charging capabilities and detailed model of both incorporated battery technologies. Robustness, load levelling, peak shaving, ancillary service features and simulation results of the proposed EMS dispatch model were confirmed under the presence of different levels of power mismatch, the high intermittence of PV power output and the EV penetration. The simulation study is carried out with Matlab/Simulink considering the load profile curves of residential and commercial loads connected to the system with a 5 minutes dispatch interval.