计及电动汽车充电与可再生能源协同调度的负荷特性分析

Load characteristics analysis considering cooperative dispatch of EV charging and renewable energy power generation

电动汽车与可再生能源的协同调度是促进可再生能源消纳、平抑可再生能源并网带来的波动、减少电动汽车无序充电对电网影响的有效手段。本文以降低光伏发电入网后电网的净负荷波动为目标,建立电动汽车与光伏发电协同调度的数学模型。同时,针对现有的研究缺乏对电动汽车有序充电后的电网和电动汽车负荷特性进行定量分析的问题,提出特性评价指标,用于定量分析电动汽车响应调度后电网的负荷特性,并评估协同调度的效果和影响。最后,采用天津市某区域的数据进行仿真分析,结果表明,本文所提出的协同调度模型在不同光伏渗透率下均能有效地平抑可再生能源波动,减少负荷峰谷差。

Cooperative dispatching of electric vehicle(EV)and renewable energy is one of the effective means to promote the absorption of renewable energy,to calm the fluctuation caused by grid-connected renewable energy and to reduce the impact of EV disordered charging on the power grid.In order to reduce the net load fluctuation of photovoltaic(PV)power grid,a mathematical model of cooperative dispatching between EV and PV generation was established.At the same time,because of the lack of quantitative analysis on the load characteristics of electric vehicles after orderly charging,the characteristic evaluation index was proposed to quantitatively analyze the load characteristics of electric vehicles after response dispatching,and to evaluate the effect and influence of coordination dispatching.Finally,the data of one area of Tianjin were used for simulation analysis.The results showed that the proposed cooperative scheduling model could effectively suppress renewable energy fluctuation and decrease load peak-valley difference under different PV permeability.