随着电动汽车的快速发展,电动汽车参与微电网调度受到越来越多的关注,研究考虑电动汽车用户需求的能量管理问题有助于微电网的稳定经济运行。基于此,文章提出一种计及电动汽车用户需求的直流微电网经济调度策略。针对电动汽车用户对于充电时间和充电速度需求方面的问题,建立分级充电价格下的电动汽车分类模型,包括即时型、弹性型、补偿型和夜间型等4种充电类型。参与微电网调度的用户提前一天通过手机App上传预约信息,微电网调度中心综合用户预约信息和可再生能源与重要负荷的日前预测数据,以系统的运行维护成本和联络线功率波动最小为目标,考虑各单元相关约束条件,对电动汽车的充电时间合理规划。最后通过算例仿真结果验证了调度策略的经济性和有效性。

With the rapid development of EVs, more and more attention has been paid on the dispatching of electric vehicles participating in micro-grid. Studying the energy management of EV users' requirements is helpful to the stable and economic operation of micro-grid. An economic dispatch strategy of DC micro-grid, which takes into account the needs of EV users, is proposed in this paper. When considering the different demands of EV users for charging time and charging speed, an EV classification model under the graded charging price is established, including four charging types such as instant type, elastic type, compensating type and night type. Users participating in micro-grid dispatching upload reservation information through mobile App one day in advance. The micro-grid dispatch center integrates the user appointment information and the day-ahead forecast data of renewable energy and important loads, and takes the goal of minimizing the operating cost of the system and the converted cost of the power fluctuation of the tie line, considering the relevant constraints of each unit, so as to realize the reasonable planning of the charging time of EVs. Finally, an example is given to verify the economy and effectiveness of the scheduling strategy.