含电动汽车充电站的风/光/柴独立微电网分层优化调度

Hierarchical optimal dispatching of wind/PV/diesel islanded microgrid with EVs charging station

为解决电动汽车通过有序充/放电参与微电网运行的多利益主体优化调度问题,提出一种含电动汽车充电站的风/光/柴微电网多时间尺度分层优化调度方法。首先分析电动汽车充电站和微电网运营商之间的利益关系,建立含电动汽车充电站的风/光/柴微电网分层调度体系;然后考虑风/光/柴微电网不同工况下的发电成本和电动汽车放电成本建立充/放电定价机制,引导电动汽车群有序充电与短时放电;接着考虑分布式电源和负荷预测的准确度,建立含电动汽车充电站的风/光/柴微电网日前/短时优化调度模型;最后采用混合整数线性规划算法对模型进行求解。仿真结果表明:该方法能够实现电动汽车群对风/光/柴微电网的“有序充电-能量支持,短时放电-功率支持”以及电动汽车充电站和微电网运营商两个利益主体之间的协同增效,并验证了该方法的正确性和有效性。

A multi-time-scale hierarchical optimal dispatching method for wind/PV/diesel microgrid with electric vehicle charging station is proposed in order to solve the problem of multi-stakeholder optimal scheduling of electric vehicles participating in microgrid operation through orderly charge/discharge.Firstly,the interest relationship between electric vehicle charging station and microgrid operator is analyzed.Besides,a wind/PV/diesel microgrid hierarchical dispatching system with electric vehicle charging station is established.Secondly,the charging/discharging pricing mechanism is established by considering the power generation cost and discharge cost of electric vehicle under different working conditions to guide the orderly charging and short-term discharge of electric vehicles.Thirdly,the day-ahead/short-term optimal scheduling model of wind/PV/diesel microgrid with electric vehicle charging station is established by considering the accuracy of distributed power generation and load forecast-ing.Finally,the mixed integer linear programming algorithm is used to solve the model.The simulation results show that the method can realize the"orderly charging-energy support,short-term discharge-power support"of the electric vehicle group to the wind/PV/diesel microgrid.In addition,it can realize the synergy between the electric vehicle charging station and the microgrid operator.As a result,the correctness and effectiveness of the method are verified.