Battery electric vehicles (BEVs) and plug-in hybrid electric vehicles (PHEVs) are becoming more popular in recent years. Apart from charging vehicles from grid, it has been proposed that electric vehicles (EVs) can help grid with variety of services such as ancillary service, regulation and pick shaving, with reverse power flow. While application of EVs to sustain grid in high demand time will not be a smart idea of the field, helping local distribution grid in the event of power outage in an emergency situation such as floods or storms to improve security and reliability of the grid, may use as a lucrative idea.