Research Of Network Loss Considering Electric Vehicle Charging Stations Based On DOE

With the rapid development of electric vehicles(EV),a large number of supporting facilities have also been built.EV charging stations work not only for charging EVs,but also bringing energy back to the grid in the power peak,so it can be regarded as a new type of load.When it is connected to the regional distribution system,it will have a great impact on the network loss.In order to reducing the network loss,this paper focuses on the design of experiments(DOE)to study the electrical access points and the work power of the charging stations.First of all,the charging substations connected to the distribution network are described in principle and ideally modeling.A case is carried out for the situation that a single station is connected to the distribution network.This paper analyzes the variation law of active power loss caused by a single charging station accessing the distribution system.According to different working modes of the station,this paper proves the feasibility to reduce the loss from station as a load and distributed generation(DG).Then,modeling and analyzing multiple charging stations access the distribution systems based on the Plackett-Burman design in DOE method.According to the perspective of network loss-access power influence coefficient,the grid nodes are grouped,and the typical node groups are further studied.Finally,a fast estimation method of power loss based on DOE is proposed,for the situation that several charging stations with unknown operating conditions access certain fixed electrical nodes of the distribution system,which can reduce the number of simulation tests significantly and reflect the information of the modeling accurately.This paper optimizes the combination of the charging stations working power,which effectively reduce the regional distribution network loss,providing reference for the future research.