面向电力系统灵活性的电动汽车控制策略

Control Strategy of Electric Vehicles Oriented to Power System Flexibility

随着碳中和目标的不断推进,我国可再生能源消纳面临的形势会更加严峻,亟须挖掘更多的电力系统灵活性调节资源。电动汽车作为一种新型可变负荷,能够通过与电网的互动增强电力系统的灵活性,保障系统的经济安全运行。该文针对现阶段缺乏面向电力系统灵活性的电动汽车充放电控制研究的现状,对面向电力系统灵活性的电动汽车控制策略进行研究。给出电力系统和电动汽车的灵活性定义,设计了“最大可提供灵活性计算—电力系统灵活性需求计算—电动汽车灵活性控制”的灵活性调度方案,以充分挖掘电动汽车的灵活性调节潜力,促进可再生能源消纳。算例分析表明,该文提出的电动汽车灵活性控制策略能够极大地改善电力系统的灵活性,同时该文模型的求解时间为秒级,完全可以满足电力系统地实时灵活性调度需求。

With the advancement of the carbon neutrality goal,the renewable energy consumption situation in China will become more severe.There is an urgent need to tap more power system flexibility resources.As a new type of variable load,electric vehicles can enhance the flexibility of the power system through interaction with the grid,and ensure the economic and safe operation of the system.In view of the current lack of research on the charging and discharging control of electric vehicle oriented to power system flexibility,this paper studies the control strategy of electric vehicles oriented to power system flexibility.Given the definition of the flexibility of the power system and electric vehicles,a flexibility dispatch scheme of"calculation of the maximum available flexibility-calculation of power system flexibility demand-flexible control of electric vehicle"is designed to fully tap the flexibility adjustment potentials of electric vehicles to promote the consumption of renewable energy.The analysis of case study demonstrates that the flexible control strategy of electric vehicles proposed in this paper can greatly improve the flexibility of the power system.At the same time,the solution time of the model in this paper is in the order of seconds,which can fully meet the real-time flexibility dispatch requirements of the power system.