Coordinated Control of EV Charging Stations for Grid Frequency Support Using Dual Droop Control Strategy Employed For VSC & DAB Converters

Battery technology and power electronic converters have facilitated the widespread use of Electric Vehicles (EVs), resulting in reduced rotational inertia and frequency stability of the power system. To address this issue, grid frequency support must be provided through various methods, including the regulation of power exchange between the grid and grid-tied inverter. Virtual inertia can be obtained from the energy stored in the DC link capacitors of the grid-tied VSC and the battery charging points. Coordinated droop control strategies from the VSC and EV charging ports can provide frequency support to the grid during disturbances. This session will discuss the use of EMTP® simulations to develop coordinated droop control strategies for mitigating frequency stability issues.