电动汽车可调度能力模型与日内优先调度策略
Schedulable Ability Model and Priority-based Intraday Scheduling Strategy for Electric Vehicle
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摘要: 提出了"可调度能力"概念,表征单辆电动汽车(EV)基于车电互联技术接入特定配电网参与系统运行调控时的动态能量平衡能力,并构建了EV日内优先调度模型。首先,为精细量化EV可调度能力,综合EV电池损耗程度、用户信用度和反向供电能力等建立EV可调度能力分析模型;其次,以配电网总负荷峰谷差最小化为指标,结合EV可调度能力分析模型与供需两侧协同优化的两阶段优化调度模型,兼顾用户用车习惯确定可调度能力最优阈值;最后,基于新入网EV的可调度能力评估结果与最优阈值的数值关系,判断车辆有无优先调度权,从而构建了单辆车的事件驱动型日内优先调度方法。以某居民区充放电设施集群为例进行了仿真分析,算例结果验证了所提模型的合理性、有效性。Abstract: A new concept of schedulable ability（SA）is proposed to represent the ability of dynamic and two-way energy balance for electric vehicles（EVs）in a certain distribution network,with a priority-based intraday scheduling optimization model for EVs built.Firstly,the SA model is formulated to analyze SA of EVs quantitatively,which takes battery loss,customer’s credit and discharging capability of EVs into account.Secondly,based on an analytic model of SA and two-stage supplydemand coordinated optimization method for EVs,the optimal threshold value of SA for EVs is obtained to minimize the peakvalley difference of distribution system load considering customer’s driving habit.Finally,the scheduling priority of EVs is determined by numerical comparison between its SA assessment result and the optimal threshold value of SA,thus creating the priority-based intraday scheduling strategy for EVs on the event-driven basis.A certain residential district is taken as an example to show the rationality and effectiveness of the proposed optimization model.
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