Introducing large-scale electric vehicle( EV) into a pow er system w ould bring great impacts on pow er system 's planning,operation as w ell as electricity market development. This paper studied the unit commitment in pow er systems w ith considering large-scale EV,and proposed a unit commitment model w ith taking the needs of EV charging as constraints and the charging possibility of an EV in a certain period as the control variable that could be optimized. Taking the unit commitment of a 10-units 24-hour...