  Lately, increasing number of electric vehicles (EVs) in residential parking
station has become an important issue, because excessive number of EVs can
destabilize the power system during peak hours with high charging power
requested. When the power system of the residential parking station takes the
structure of microgrid (MG), power provision for the EVs requires efficient
power management scheme. To minimize the maintenance cost of the MG and
maintain the grid stability, the MG needs to balance the charging/discharging
power of EVs in the parking station. To achieve these goals, this paper
proposes a charging/discharging algorithm suitable for the power management of
the MG configured with EVs. Multi-objective optimization is taken to MG to
minimize the maintenance cost and the grid dependency while maximizing the use
of photovoltaic (PV) power and the utilization of EVs as energy storage systems
(ESSs). In our approach, to increase the usefulness of discharging power of
EVs, the base load and the PV power production are considered together for
power management to mitigate imbalances incurred between them. As a result,
proposed approach demonstrates superior power management performance as
compared to other comparable ones.
