The Impact of Electric Vehicles Aggregator on the Stability Region of Micro-Grid System with Communication Time Delay

This paper investigates the impact of Electric Vehicles (EVs) on the stability region of micro-grid (MG) system with constant communication delays. A simple and efficient graphical method based on extracting the boundaries of stability regions is used to compute all stabilizing values in proportional-integral (PI) parameters space for a specified time delay. Verification of theoretical stability region boundaries is shown by time-domain simulations for test points selected from stability regions. Results show that the size of stability regions gets larger with the integration of EVs into the MG system, indicating that the stability of the MG system is improved.