Abstract: With the increasing utilization rate of electric vehicles（EVs）in China，high permeability EVs make

the three-phase imbalance rate of urban distribution network increase day by day，which causes problems such as

voltage fluctuation and network loss increase，and the distribution network with high three-phase imbalance rate also causes damage to the battery of EVs.An orderly charging control strategy for EVin three-phase unbalanced distribution network was presented. Firstly，by analyzing the reactive power supporting capacity of EV charging inverter，the reactive power compensation mathematical model of EV under three-phase unbalanced distribution network was established. Considering the operation of the distribution network and the charging needs of users in a comprehensive way，the charging demands of EVs were classified on the urgency level，and an orderly charging ordering method of EVs based on the ideal solution method was established. Finally，through the simulation of a real three-phase unbalanced distribution network，the results show that this method can not only ensure the orderly charging of EV，but also improve the voltage level of the distribution network，network loss and three-phase unbalanced rate.

      Key words:electric vehicle（EV）orderly charging；reactive control of inverter；three-phase unbalance；active

distribution network