Autonomous Frequency Regulation Using Battery Energy Storage Systems of EV Charging Station (June 2023)

Increasing penetration of replenished renewable energy sources (RES) to the power grid is inevitable and brings stability challenges traditional electric systems (EPS). One them frequency fluctuation due high participation RES in EPS. To reduce deviation, this paper, an autonomous regulation (FR) controller proposed using battery storage (BESS) vehicle charging stations (EVCS) while providing service. A proportional-integral (PI) scheme with a contribution factor used FR controller. The determines maximum from BESS for FR. required then generate setpoint inner-loop current grid-connected inverter (GCI). An impedance-based analysis considering PI PLL gains LCL-filtered GCI conducted. For performance evaluation, demonstrated IEEE 14-bus system PSCAD simulation.