| In the context of the energy crisis and global warming,the development of electric vehicles has become an important measure for energy conservation and emission reduction in various countries.However,with the gradual increase in the number of electric vehicles in residential areas,the disorderly access of a large number of charging loads will result in increased fluctuations in the distribution network load in residential areas,reduced equipment utilization,and shortened life of distribution transformers.This paper firstly describes and summarizes the behavior characteristics of car owners in residential areas,the charging methods of electric vehicles and battery characteristics,gives the charging load model of electric vehicles,and uses Monte Carlo method to simulate and analyze the disordered charging of electric vehicles.Under the premise of ensuring the electricity demand of residential users and the normal operation of distribution transformers in residential areas,three orderly charging strategies are proposed.A charging strategy with dual goals and load follow in the phase.Through the chicken swarm algorithm to solve,it is concluded that in the two-stage dual-object charging strategy,the user’s charging cost is the lowest,and the load peak-to-valley difference in the residential area is further reduced.Through the analysis of calculation examples,the charging strategy with the lowest charging cost for users will form a new peak of electricity consumption in the trough,which is not conducive to the reduction of the load peak-valley difference in residential areas;the two-stage dual-target orderly charging strategy can avoid the generation of new load peaks.And further reduce the load peak-valley difference in residential areas,but will produce greater fluctuations during the alternating period of valley and flat electricity prices;load-following charging strategies can make the load fluctuations in residential areas more gradual. |
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