考虑积压惩罚机制的含BSS微网联合系统优化调度策略

Optimal Scheduling Strategy for Joint System With Micro-grid Containing BSS Considering Overstock Punishment Mechanism

换电站(batteryswappingstation,BSS)作为电动汽车能源供给的重要来源,在日常运营中欠缺对负荷换电完成程度的考虑。提出了电动汽车积压惩罚机制,并构建了BSS与含风电微电网结合的联合系统调度模型。积压惩罚机制充分考虑了系统调度策略对于换电完成程度的影响,并将BSS换电完成程度反馈给系统调度层从而生成更合理的充换电计划。该模型以系统运行成本最小化为目标函数,综合考虑了电池供给约束和换电站电池充电约束,并通过优化软件CPLEX求解该模型。最后,在某微网系统下,对系统孤网运行和并网运行两种方案进行对比分析,验证了系统并网运行方案的优越性。同时通过灵敏度分析表明,适当调整初始系统状态可减少系统运营成本,提高风电消纳。

As an important source of energy supply for electric vehicles,the battery swapping station(BSS)lacks consideration of accomplishment degree of battery swapping in daily operation.In this paper,an overstock punishment mechanism for electric vehicles is proposed,and a joint system scheduling model combining BSS with a micro-grid containing wind power is constructed.The overstock punishment mechanism fully considers the impact of the system scheduling strategy on the user side,and the accomplishment degree of battery swapping is fed back to the system scheduling layer so as to generate a more reasonable charging and swapping plan.The model takes the minimum system operating cost as the objective function,comprehensively considers the battery supply constraints and the battery charging and discharging constraints of the substation,and it is solved by the optimization software CPLEX.Finally,in a certain micro-grid system,a comparative analysis of an isolated network operating mode and a grid-connected operation mode is conducted to verify the superiority of the grid-connected operation mode.Sensitivity analysis shows that proper adjustment of the initial system state can reduce the system cost and increase wind power accommodation.