基于蒙特卡洛法的电动汽车无序充电对电网的影响分析

Analysis on the Impacts of Electric Vehicle Disorderly Charging on Power Grid Load Based on Monte Carlo Method

在无序充电模式下,电动汽车大规模接入电网给电网运行安全带来了新的挑战。在研究影响电动汽车充电负荷因素的基础上,建立了无序充电的数学模型并利用蒙特卡洛法进行模型计算。在特定区域内,选取一定数量的电动汽车进行模型验证。结果表明,电动汽车无序状态下接入电网充电,不仅拉大了负荷峰谷差,而且加剧了负荷曲线波动,同时电网负荷峰谷差率也有所增加,电网电压偏差也有所变化,给电力系统调峰带来了压力。

In the disorderly charging mode,the large-scale access of electric vehicles to the power grid brings a new challenge to the operation Safety of the power grid,the mathematical model of the disorderly charging is established based on the factors affecting the charging load of the electric vehicles.The Monte Carlo method is applied to calculate the disorderly charging load.In a specified area,a certain number of electric vehicles are utilized to verify the model.The charging load and the grid regular load constitute the totality of loads for electric vehicles charging.The impacts of charging load to the grid are measured by the peak-valley ratio of the total loads.The simulation results show that the disorderly charging load make the peak-valley difference and peak-valley ratio increase,and the fluctuation of the load curve is aggravated,which make influence on peak load dispatching system.