Abstract:
The interest on electric vehicles growing as a
sustainable alternative to fossil fuel driven vehicles. Even though
there are a number of grid impact studies, only a scant attention
has been paid to study the impact of EV charging on system
stability. Electrification of transportation brings significant load
integration to the grid. This could profoundly influence stability
of the grid. Hence, it is important to understand the EV charging
impact on power system stability. The extant literature is largely
based on conventional load characteristics rather than actual EV
load behaviours, due to the unavailability of proper load models.
Hence, this study develops a dynamic EV load model, considering
the dynamics of the EV charger and the battery, as an essential
basis for system oscillatory stability studies. Dynamic behavior of
a power electronically controlled EV load is described by an
eleventh order model. The preliminary results suggest that EV
load can cause considerable influence on damping performance
of electromechanical modes.
