住宅小区电动汽车有序充电潜力评估

电动汽车的充电管理方式影响充电设施配电容量的规划设计,对住宅小区电动汽车进行有序充电,可实现削峰填谷,提高配变利用率,增加充电设施接入容量。结合住宅小区住户充电行为习惯,建立住宅小区充电负荷概率模型,并提出充电负荷同时率和叠加率两个关键参数表征充电负荷变化特性。在此基础上,建立电动汽车充电负荷与居民用电负荷规划计算模型,并通过数学解析法得出配变负载率与住宅小区电动汽车最大渗透率之间的关系,对住宅小区电动汽车有序充电潜力进行定量评估。该研究可为住宅小区充电负荷精益管理、充电设施配电容量合理配置提供科学参考。

Assessment of orderly charging potential of electric vehicles in residential areas

The charging management mode of electric vehicles affects the planning and design of the power distribution capacity of charging facilities. Orderly charging of electric vehicles in residential areas can achieve peak load shifting, improve the utilization rate of distribution transformer and increase access capacity of charging facilities. In this paper, a probability model of charging load in residential area is established based on the charging behavior of residents, and two key parameters of charging load, simultaneous rate and stack rate, are proposed to characterize the changing characteristics of charging load. Furthermore, the planning models of the electric vehicle charging load and residential electricity load are established, and then the relationship between the transformer load rate and the maximum permeability of electric vehicles in residential areas is obtained through mathematical analysis to quantitatively evaluate the potential of orderly charging of electric vehicles in residential areas. This paper can provide scientific reference for lean management of charging load and reasonable configuration of distribution capacity of charging facilities in residential areas. This work is supported by Science and Technology Project of China Southern Power Grid Co., Ltd. (No. ZBKJXM 20160003).