The Method And Practice Of Planning And Layout Of County Public Charging Facilities

With the support of the dual-carbon goal strategy,the electric vehicle market has witnessed explosive growth in recent years.The electric vehicle market in large and medium-sized cities has already reached saturation,making county towns the main target for the development of electric vehicles in lower-tier markets.Public charging facilities serve as energy supply infrastructure for electric vehicles and have begun to be deployed in vast county areas.However,the development stage and spatial structure of facilities in county towns differ significantly from those in large and medium-sized cities,currently facing issues of spatial layout and imbalanced supply and demand.This article takes this as a starting point and,based on an analysis of the current layout status in different county areas,constructs a methodological framework for the layout of public charging facilities addressing both demand and layout issues.First,six representative county towns are selected to analyze the characteristics,models,and utilization of public charging facility layouts,summarize layout problems and influencing factors,and address the mismatch between charging demand and facility construction in county areas.The Bass diffusion model is used to predict the recent demand for charging loads and allocate them to different towns and land units within the central city area.Next,considering the differences between county towns and the layout patterns,a hierarchical planning and layout method is proposed,including central city charging stations,clusters of charging piles,and county-level clusters of charging piles.Potential sites with construction conditions are selected within the county area.Target sites for primary central city charging stations are evaluated and selected using the Huff gravity model,carrying the majority of charging demand in an intensive land-use and dedicated distribution form.This approach caters to users’ preference for fast charging while addressing spatial constraints and limitations of the distribution network in urban areas.For secondary clusters of charging piles in central city areas,land units are allocated based on the principle of minimum facility points using Arc GIS network analysis tools.The number of piles is determined for each target cluster based on the allocated load,focusing on slow charging to improve charging convenience while guiding the upgrade and transformation of the current distribution network in urban areas.County-level clusters of charging piles are differentially laid out within towns,township centers,and highway service areas according to the proposed planning principles and requirements.They meet the charging needs of intra-county and intercity transportation,forming a network system of public charging facilities in the county.Finally,taking Quanzhou County in Guilin,Guangxi as an example,the economic,transportation,and urban system overview of the county are analyzed.The constructed methodological framework for layout is applied to form a comprehensive layout plan for public charging facilities in the county,verifying its feasibility.