Abstract:Charging facilities is a new operation system. Limited by operating costs, charging demand, site and other conditions, the system presents a low coverage, dense and unbalanced layout. The degradation law of charging facilities in technology is not clear yet, but the inherent property of performance degradation still exists. In order to ensure that charging facilities work well to meet the charging needs of new energy vehicle users, it is proposed to establish professional maintenance teams to conduct joint maintenance of charging facilities of different operators on a regular basis. Firstly, the shortest path model of joint maintenance is established; secondly, DBSCAN algorithm is introduced to cluster charging facilities in the region according to their distribution density, and the clustering results are set as virtual maintenance points of charging facilities. Based on the address and location information of virtual maintenance points, the distance matrix of vehicles is established, and GA, TS or GA TS is used to plan joint maintenance paths, so that the maintenance team can make a single inspection. The shortest total path is repaired. Finally, an example of charging facilities in the eighth District of Chongqing main city is given.