  Supported by the technical development of electric battery and charging
facilities, plug-in electric vehicle (PEV) has the potential to be mobile
energy storage (MES) for energy delivery from resourceful charging stations
(RCSs) to limited-capacity charging stations (LCSs). In this paper, we study
the problem of using on-road PEVs as MESs for energy compensation service to
compensate charging station (CS) overload. A price-incentive scheme is proposed
for power system operator (PSO) to stimulate on-road MESs fulfilling energy
compensation tasks. The price-service interaction between the PSO and MESs is
characterized as a one-leader, multiple-follower Stackelberg game. The PSO acts
as a leader to schedule on-road MESs by posting service price and on-road MESs
respond to the price by choosing their service amount. The existence and
uniqueness of the Stackelberg equilibrium are validated, and an algorithm is
developed to find the equilibrium. Simulation results show the effectiveness of
the proposed scheme in utility optimization and overload mitigation.
