From a market perspective, the multiplicity of different
domains within the SUG represents a major variable for the
generalized model. Even for MGs operating autonomously, in
some cases the association of them for market participation
and business purposes could be more profitable for the different
MG agents, because of the respective available RESs and
DERs and because of the respective internal costs and energy
prices elasticity, the latter depending on the whole dealing
with the SG interface. A second variable in the modeling within
the market is the flexibility of the EV service organization
and management, which in general depends on the way of aggregating
the local EV parking and charging demands and on
the possibility of implementing different V2G services. Other
variables can be the EV aggregator (real or virtual parking areas
characterized by rated parameters of physical extension,
EV parking places, plug-in places, unidirectional/bidirectional
service) and some management variables that can be assumed
in terms of service timetable, sharing of EV service capacity
among internal (inside parking area), public and resident customers,
etc.