换电站对配网无功优化的影响研究

换电站作为电动汽车的主要充电基础设施，随着电动汽车的普及也将大规模建设。为了分析大规模换电站接入配网对无功优化产生的影响，提出了以换电站充电负荷对配网无功优化的影响为研究对象。首先基于力帆换电站的历史数据分析了换电站充电负荷影响因素的分布规律，然后采用蒙特卡洛仿真模拟建立了换电站的充电负荷模型。还建立了配网无功优化的数学模型，采用禁忌搜索算法求解数学模型。考虑到换电站充电负荷为概率模型，采用基于蒙特卡洛模拟的随机潮流进行潮流计算。最后从换电站充电负荷的渗透率角度分析了对配网无功优化的影响，得出的结论是换电站充电负荷的渗透率为一定值时，相比未接入换电站充电负荷的情况，可以降低电容器的投切次数，延长电容器的使用寿命。

The influence of Battery Swapping Station on Reactive Power Optimization in distribution Network

With the popularization of electric vehicles, the battery swapping station as the main charging infrastructure of electric vehicles will be built on a large scale. In order to analyze the impact of mass battery swapping stations access to distribution network on reactive power optimization, the research object is to study the influence of battery swapping station distribution network on reactive power optimization. Firstly, the influence factor distribution of battery swapping station charging load is analyzed based on the historical data of Lifan battery swapping station. Then the battery swapping station charging load model is built based on Monte Carlo simulation. The distribution network reactive power optimization mathematical model is established and the Tabu search algorithm is used to solve the model.Considering the probability model of battery swapping station charging load, the stochastic trend is used to complete the power flow calculation.Finally, the permeability of battery swapping station are employed to analyze the effect on the distribution network reactive power optimization. It is concluded that when the permeability of the charging load of the battery swapping station reach a certain?value, the capacitor switching?times would been reduced and the capacitor lifetime can be prolonged compared to the condition that the charging load of the battery swapping station is not connected.