This paper presents a new methodology for the systemic
study of V2G integration in EUAs. MG and SG concepts are
recalled to develop a new modeling paradigm, the SUG,
which is suited to flexibly represent the different complexities
possibly arising from the V2G integration. Proposed methodology
and model are then applied to the electricity market context
to analyze the new mechanisms introduced by the participation
of an EV service entity in the short-term energy trading
of an EUA. Unidirectional V2G is considered for the EV entity.
Since the energy trading problem should be addressed as
an optimization problem, the SUG model is translated into
mathematical formulations that properly take into account the
EV service via attributes characterized by indices.