计及电动汽车可调度能力的风/车协同参与机组组合策略

Unit Commitment Strategy Considering Cooperated Dispatch of Electric Vehicles Based on Scheduling Capacity and Wind Power Generation

为了通过调度电动汽车充放电来消纳更多的风电,提出一种计及电动汽车可调度能力的风/车协同参与机组组合策略。将电动汽车负荷按照可调度能力划分为无序充电负荷、可调度充电负荷和可调度充放电负荷,利用车辆行驶行为特性模拟电动汽车出行规律,建立电动汽车状态矩阵和电动汽车可调度充放电容量模型。将电动汽车充放电负荷作为机组组合中的变量,建立电动汽车与风力发电协同参与的机组组合模型。从经济效益角度分析当汽车充放电采用分时电价模式,运营商在不同类型可调度电动汽车互相组合情况下,常规机组运行费用、风电弃风量以及调度电动汽车充放电时运营商获益情况和用户充电花费情况。算例分析结果表明电网通过合理调度电动汽车充放电可以提高风电消纳能力并降低车网互动成本。

In order to accommodate more wind power by dispatching electric vehicle（EV） charging and discharging, we put forward a unit commitment strategy considering cooperated dispatch of EVs based on scheduling capacity and wind power generation. According to the scheduling ability, the load of EV is divided into disordered charging load, adjustable charging load, and adjustable charge-discharge load. By using the vehicle driving behavior model to simulate the travel rule of EV, the model of the EV condition matrix and the electric vehicle＇s controllable charge-and-discharge capacity can be set up. The EV charge-discharge load is used as a variable in the unit commitment. A unit commitment model is proposed for optimal coordination of wind power generation and charging load of EV. From the aspect of economic benefit, we analyze the unit cost, wind curtailment, the operator benefit, user charge cost in different combination of EVs when the EVs charge and discharge adopt the time-of-use prices. Cases study shows that,by the proposed UC model, the wind abandonment can be decreased as well as the cost of Vehicle-to-Grid（V2 G）.